Spock (alternate reality)/Starfleet career/Five-year mission/Altamid

Before Spock could inform Starfleet or Captain Kirk of his decision to leave, the Enterprise was dispatched to the Necro Cloud ostensibly to rescue the crew of Kalara – in secret an agent of Krall. As the Enterprise was attacked and boarded, Spock and McCoy left the bridge to investigate and repel the invading force. Witnessing Krall obtain the alien artifact Abronath, Spock was pursued by the invaders, escaping into a turbolift with McCoy. As the Enterprise was severely damaged in the battle, the turbolift containing Spock and McCoy was ejected into space and captured by a Swarm ship. Escaping the lift, Spock and McCoy commandeered the Swarm ship and crashed on the surface of Altamid as the Enterprise was destroyed.
Severely injured in the crash and suffering from massive blood loss, Spock was treated by McCoy as best the doctor could under the circumstances. Finding an alien structure, Spock recognized markings indicating Altamid was the origin of the Abronath, a super weapon hunted for by Krall. In the structure, Spock again experienced a loss of emotional control, alternating between mortal fear, hopelessness, and giddiness when interacting with McCoy. 
Finally located by their fellow Enterprise crewmates aboard the wreck of the , Spock was immediately taken to the ship's mess where McCoy began emergency surgery. As the doctor repaired the hemorrhage, Spock assured Kirk they would "find hope in the impossible" and later assisted in locating the rest of his shipmates by using the ship's sensors to track the vokaya necklace he had given to Lieutenant Uhura.
After assisting in the rescue of the Enterprise crew from Krall's encampment, Spock volunteered to once again board a Swarm ship to prevent Krall from unleashing the Abronath at Starbase Yorktown. Once again joined by a reluctant McCoy, Spock helped pilot a Swarm ship as the Franklin used radio signals to disrupt Krall's swarm. Pursuing a single ship piloted by Krall into Yorktown's internal structure, Spock and McCoy assisted in the destruction of Krall's ship before rescuing Kirk as he fell from Yorktown Headquarters.