Graves are broken and need a nerf . they either need 3 blank sides or to spawn a weaker version of bones with 3HP . they are the most broken spawning enemy in the game . it literally ended so many runs i had just because i was unable to have enough cleave attacks on multiple heroes or spells . they counter any build that don't have enough attacks that hit multiple enemies .
the idea with graves is to use the skeletons to damage them. when skeletons die, they damage adjacent foes. manipulating skeleton damage is really fun once you get the hang of it!
graves aren't dangerous themselves. as long as we can kill enough skeletons to keep their numbers manageable, the graves will die eventually.