Answer:
Lionblaze was Bluestar's deputy for awhile then was killed and now walks with StarClan!
Step-by-step explanation:
The two fight until Lionblaze bites Shredtail's throat, killing him a second time. Blackstar says that he is proud to fight beside Lionblaze. Lionblaze is later seen leading the Ancients into ThunderClan camp to fight the Dark Forest cats. Breezepelt tries to kill Lionblaze, but Crowfeather saves him.