Bane of the Trapped is a Legendary Gem in Diablo III. It can only be socketed into Amulets and Rings, and drops from Greater Rift Guardians. While equipped, it multiplicatively increases damage done to enemies under any Crowd Control effect, applied by either the gem's owner, traps or other players. An attack that applies such effects is not amplified if the target is not under CC yet. Upgrading increases the damage bonus.