From Guild Wars 2 Wiki
- Capture the beast (80) [Group Event]
- Slams Area
- Stomp - A large AoE attack.
- Undead Grub Spit - Basic ranged attack.
- Rock Shards - The grub burrows, evading damage. After a few seconds, it emerges to the surface, damaging nearby targets.
- Stolen skills
- Spawns after the Unchained Silverback Gorilla reaches about 50% HP.
- Once the event is successfully completed, Wrangler Winfred drags the Grub back to his original location.