Prince Yriel - The Naga's Strike: As the centuries ground on, the Warp Storms around the Ybaric Cluster faded, allowing contact with the Exodite worlds therein. Alas, no sooner had the Warp Storms faded than a new enemy descended in 131.809.M41. Hive Fleet Naga, a remnant of the Behemoth that was, had set its sights on the bountiful worlds of the Ybaric Cluster. To their credit, Iyanden, and its sister Craftworlds of Malan'tai and Idharae, responded almost immediately, but even so, they were too slow.By the time the first Aeldari fleets had engaged Hive Fleet Naga, Halathel, largest and most prosperous of the Exodite worlds, was all but overrun by Tyranids, and a second tendril of the Hive Fleet was turning back rimwards towards the Maiden World of Eth-aelas. The Exodites of Halathel were unable to abandon their kin's souls contained in the planet's World Spirit and so began to fortify Halathel's World Spirit shrine while begging with nearby Craftworlds for assistance.The first tendril outstripped the crippled Malan'tai fleet to arrive at Halathel first, and in 801809.M41 launched waves of Mycetic Spores onto the planet. The defenders withdraw to the World Spirit shrine to make a desperate last stand. Thousands of Termagants and Hormagaunts hurled themselves at the shrine's walls to deplete the enemy's ammunition stores, but the Exodites held out for three days and three nights until the Tyranids ceased their assault. When the Tyranids launched their second siege on the shrine, it dwarfed the first in numbers and fury. By dusk, Naga had broken through the outer defences and began pouring through the breaches. Exodite Lord Wei-yannil stood against the Hive Tyrant, leading the assault to buy time for the Aeldari to withdraw. Both combatants were slain in the fight -- Wei-yannil slew the Hive Tyrant, but was then torn apart himself by the beast's rampaging Tyrant Guard. With the synapse creature's death, the Tyranid swarm lost cohesion and withdrew.Above Halathel, a fresh fleet from Iyanden commanded by Admiral Draech engaged the Hive Ships orbiting the planet. But even with the aid of forces from Malan'tai and Idharae, the Exodites could not repel the invaders. Iyanden's forces, under the command of Admiral Draech, arrived at Halathel to discover its World Spirit destroyed and its defenders consumed. Determined to exact vengeance for Halathel, the Iyanden fleet engaged the orbiting Hive Ships, but underestimated the menace of their foes. Draech's flagship, the Auspicious Illumination of Eternity, was destroyed early in the battle, and for a time, it seemed that the whole Aeldari fleet would be lost alongside it.Only when a young prince named Yriel took command did the tide of battle turn. Realising that the smaller Tyranid vessels could not function if the greater bio-ships were destroyed, Yriel converged his forces on these targets, but it was only when the prince unleashed boarding parties to destroy the ships from within that he meet with success. Though many Aeldari lives were lost and hundreds of ghost warriors destroyed, the ships were finally slain.With their passing, the smaller Tyranid vessels flew into an uncoordinated frenzy and were easy prey. Though the strength of Hive Fleet Naga had been greatly diminished, its threat was not yet ended. On the planet below, the World Spirit shrine was finally taken by the forces of the Great Devourer when dozens of Trygons emerged from burrowed tunnels beneath the shrine's walls. In less than an hour, the remaining Aeldari defenders were massacred and the World Spirit was destroyed. Yriel, overwhelmed by rage, gave the order to scour all life from Halathel.In the following months, Yriel's forces joined with those of Malan'tai and Idharae to fight hundreds of engagements against the Tyranids, both in the cold dark of space and amidst the horror of partially-digested worlds. Little by little, the Tyranids were scoured from the Ybaric Cluster, and victory was at last won -- though not without great cost. Idharae, which was never the most populous of Craftworlds to begin with, lost many of its warriors defending the maiden world of Eth-aelas, and its halls were ever after empty and joyless places. Malan'tai suffered far worse and was destroyed when an aberrant form of Tyranid life devoured the Craftworld's Infinity Circuit and used the stolen power to slay the rest of Malan'tai's living Aeldari.