Poison Trophy in Assassin's Creed III: Liberation
Use berserk poison to force an enemy to kill 5 enemies
How to unlock Poison
To do this trophy, you'll require the berserk poison and you'll need to play/replay Sequence 3 mission three. After a series of conversations, you should run with Eline to a checkpoint. From there on, free run via the tree next to you till you end up near the white veteran soldier. Bring up your berserk poison and hit him. He will successfully murder every enemy, which unlocks this trophy.