Where they had unique abilities and worked together to destroy you?
They didn't heavily depend on stomp mechanics. They were mobile. They were interesting and fun.
It doesn't need to be Cabal but I'd like something similar in philosophy for a big boss fight. 2 separate mechanics/ways they attack, actually mobile, doesn't rely on stomp mechanics and immunity.
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Funny story for you: remember that Centurion Oryx took right after you landed on the Dreadnaught? Then the Centurion and that Taken Ogre tried to stop you from killing the King? Heh. Didn't work. So the Centurion's bond-brothers are pretty angry they lost their commander. They're leading a team to blow the Dreadnaught's core. The core goes, and most of the system goes with it. You're gonna make sure that doesn't happen.