Occupation of Urithiru

The occupation of Urithiru is the invasion of Urithiru by Odium's forces, and is led by Raboniel.
== Background ==
The invasion of Urithiru is first proposed by Raboniel, who brings her plan before the Nine. She explains that the current Radiants are advancing too far in terms of technology and research, and that they are outstripping the Fused. She points out that they don't yet have mastery over their powers or full access to the tower, and thus they should attack Urithiru immediately. The Nine approve of Raboniel's plan, and contact Taravangian to have him lure Dalinar and Jasnah away from the tower. During a meeting of the coalition of monarchs, Taravangian agrees with Dalinar's proposal for an offensive in Emul, and goes with both Jasnah and Dalinar on the expedition.
== The Occupation ==
=== Corrupting the Tower's Defenses ===
Raboniel and her team of five hundred Fused and Regals were dropped off by Heavenly Ones, then hiked towards Urithiru for several weeks on foot. To avoid being spotted by Windrunner patrols, the group moved only by night or during storms, and traveled at a very quick pace. The strike force made their final approach during an Everstorm. The thirty Deepest Ones moved ahead through the rock to kill the scholars and guards in the crystal pillar room and at one of the lower entrances. They managed to kill all the guards and scholars without letting them give warning to the rest of the tower, but a guard patrol came to check on the group at the entrance, and Raboniel and the rest of her force were forced to engage them. After killing the patrol quickly, Raboniel's group joined up with the Deepest Ones in the pillar room.
Raboniel began infusing the crystal pillar with her Voidlight, which took some time because of the Sibling's resistance. Before long, their incursion was noticed, and human soldiers began clashing with the strike force. Raboniel was successful, and infused a small collection of garnets with Voidlight, thus inverting the Tower's defenses that once prevented the Fused from using their powers. As soon as she corrupted the pillar, every Radiant in the Tower besides Kaladin fell unconscious. As soon as the defenses were down, a large singer force invaded the tower. Moash used Jezrien's honorblade to let a large force in from Kholinar via the Oathgate, and dozens of Heavenly Ones came in through balconies all throughout the tower. There was only one non-Radiant shardbearer in Urithiru, Tshadr, who was immediately taken out by Heavenly Ones.
=== Initial Resistance ===
When Teft fell unconscious, Kaladin quickly discovered that he had lost access to the surge of Gravitation, but still had access to Adhesion. Right before the tower was corrupted, Navani had received word from the Tower via spanreed that something was being done to them. She tried to respond, but the Tower's corruption had made spanreeds stop working as well. Navani sent a runner to the scouting office to gather every runner and scribe and bring them to meet her in the maps room on the second floor. She also gave orders to mobilize the seven garrisons in the tower, as well as the remaining Windrunners. Once in the map room, Navani conferred with Battalionlord Teofil, who told her that they couldn't hope to hold out against the enemy forces unless they revived the unconscious Radiants somehow. After some discussion, Navani ordered that all their remaining troops make a desperate assault on the pillar room, in hopes of recovering it and somehow fixing whatever knocked out the Radiants.
 
As the main bulk of the singer invasion force moved to the first floor, Raboniel encountered the Pursuer, who demanded that they should kill all the unconscious Radiants. Raboniel told him to exercise restraint, and only kill those who resisted. She also gave him permission to kill Kaladin if he was found.
Navani's troops, led by Teofil, made their assault on the basement and the crystal pillar room. They executed a controlled, fake retreat to lure a force of stormform Regals into a staging room, where they used lightning rods to divert the stormforms' attacks. Teofil's men took out the group of Regals with a wave of crossbow bolts, then charged into the basement in a renewed rush. While the soldiers rushed the pillar, Navani and the Thaylen artifabrians worked to activate a defensive shield around the crystal pillar, under the direction of the Sibling. Teofil’s force almost made it to the pillar, but the arrival of the Pursuer quickly changed the battle, and they were ultimately slaughtered before they could reach the pillar room. As the force was killed, Navani's team filled the crystal node with Stormlight, then broke it on the Sibling's orders. This formed a shield around the crystal pillar, preventing Raboniel from further corrupting the Sibling and turning her into an Unmade. 
Navani was captured and brought before Raboniel soon after breaking the node, and discussed terms for the tower's surrender. Raboniel demanded that all the unconscious Radiants be delivered to her, and that every soldier and officer must surrender their weapons. She also declared that every human in the tower must be subject to singer law, must immediately obey any order given by a singer, and may not carry weapons. In return, Raboniel allowed the humans to continue in their occupations and trade. Navani agreed to the terms, and formally surrendered the tower to Raboniel. 
=== Searching for the Nodes ===
There were four nodes in the tower, and each ones was a direct channel to the heart of the tower. Navani had destroyed one after using it to create the shield, which then weakened the shield. Raboniel began searching for the other three nodes, knowing that she could finish the tower’s corruption through any of them. Knowing this, Navani contacted Kaladin through the Sibling's veins of crystal in the tower to tell him to find the nodes and protect them, and to destroy them if necessary.
The next day, a group of Deepest Ones found another one of the nodes outside the tower atrium, and the Sibling contacted Kaladin with an urgent plea to go protect it. Kaladin arrived at the node, where Raboniel and the Pursuer were waiting. Kaladin engaged Lezian with only a spear, and with only half his powers working. With the Sibling's help, Kaladin managed to trap Lezian in a stone room. He used a piece of rubble to smash the node and destroy it, but was subsequently stabbed in the chest by Raboniel. She allowed him to retreat, and he escaped back into the tower. 
The next day, Navani gave Kaladin a glove fabrial that gave him a rough, limited method of flight. A few days later, the Sibling told Navani that one of the two remaining nodes was in the well at the Breakaway market. Unbeknownst to either of them, Raboniel was listening in on their conversation, and thus immediately sent a group to the node.
Kaladin rushed to the scene using his new fabrial glove, whereupon he was engaged by Lezian and Leshwi in turn. He broke off his conversation with the latter to make a break for the well. He dove into the water and destroyed the node before Raboniel could corrupt it, unwittingly walking into a trap. As Kaladin destroyed the node, the Pursuer put a lid over the well, and piled rocks on top of it to trap Kaladin underwater. Using Navani's glove fabrial, Kaladin managed to escape from the well through an underground tunnel system. Kaladin was quickly spotted by guards, and was forced to escape by jumping out of the tower and into the highstorm. Dalinar saw Kaladin while riding the highstorm in a vision, and Kaladin explained the situation to him. Though Kaladin lost consciousness, Dalinar was able to direct the winds to blow him into the tower.
=== Taking Back the Tower ===
News spread throughout the tower of Kaladin's fight, and several small fights broke out between singers and individual humans. Many in the tower also began drawing shash glyphs on their foreheads to show solidarity with Kaladin. Kaladin was unconscious due to his serious injuries, and hidden in a room in the tower. Venli, Rlain, and Dabbid rescued Lift from a cage, and she was able to heal Kaladin with her abilities, as well as the unconscious Teft. 
Kaladin, Teft, Dabbid, and Lift decided to try and awaken the unconscious Radiants in the infirmary using Lift's powers. While Lift and Teft made their way towards the infirmary, Kaladin walked into the atrium and engaged the Pursuer. Lift and Teft entered the infirmary successfully, but Moash ambushed them. He cut through Lift's legs with his honorblade, then wounded Teft. Moash then used a raysium dagger to stab Phendorana, permanently killing her. He then killed Teft using the honorblade, and destroyed the final node. Kaladin beat the Pursuer and forced him to flee, but was subsequently rendered insensate with grief upon finding Teft's body in the infirmary. He attacked the Fused holding his father captive, but the Fused threw Lirin off the tower. Kaladin dove after him, swearing the Fourth Ideal and saving him, before going back to the tower to fight. 
Meanwhile, Navani made her way to the unprotected crystal pillar. She managed to overpower Raboniel, then begged the Sibling to bond her as a Bondsmith. Moash arrived to kill her, and Navani began humming the tune of anti-Voidlight to remove some of the Sibling's corruption. Together Navani and the Sibling sing the Rhythm of the Tower, and the Sibling agrees to bond with her. Kaladin arrived to join a large fight between humans and singers in the Breakaway market, and announced that the singers should surrender. Navani and the Sibling then activated the Tower's defenses, knocking every Fused and Regal unconscious and waking up the Radiants. Soon after, Navani found Raboniel, who was still alive. By Raboniel's request, Navani permanently killed her with a raysium dagger.
== Aftermath == 
With every Fused and Regal in the tower dead or unconscious, the occupation ends, and the Radiants once again control the tower. With the tower's full protections now in place, future attacks on Urithiru by Odium's forces become highly unlikely to succeed. 
Several scientific discoveries are made during the occupation, primarily involving the different Lights. With Raboniel's help, Navani discovers how to create anti-Voidlight and anti-Stormlight, and makes discoveries about how Lights respond to music and vibrations. 
Several Radiant oaths are also sworn as a result of the occupation. Navani and Rlain each bond a spren, and Kaladin swears the Fourth Ideal.
== Notes ==