TERA - Kumas BAM Trailer

They deliver huge hits to players who aren’t carefully avoiding the real-time attacks. By working together, players can flank and outmaneuver BAMs to deliver lethal hits—an essential tactic in TERA, where timing and positioning always matter.
The BAMs (Big Ass Monsters) help to support the game’s “all action, no faction” aspect as players are encouraged to work together to defeat them while taking full advantage of TERA’s contextual and positional combat system.