Boomerang: When all three Sisters are alive, two perform the Boomerang attacks on the wall while the third performs a Drop attack a moment after the spears are thrown.In the case of Drop attacks, it is possible for all three Sisters to choose to chain this attack in quick continuous succession. Furthermore, the single Sister's attack will always be a Drop attack if her Sister or Sisters performed Dash attacks. The single Sister's attack is staggered to happen just after her two Sisters start their attacks whether it be Drop, Double Drop, Dash or Double Dash.
With all three Sisters attacking: two Sisters still follow the patterns of Mantis Lords Phase 2, and one Sister still follows their original pattern like in Mantis Lords Phase 1. The pattern these attacks follow loosely comes from the patterns of the original Mantis Lords fight. The Sisters of Battle use all attacks of the 2nd Phase of the Mantis Lords, but with an additional attack from a 3rd Sister: In Phase 2, all three Sisters emit a battle cry and drop in to fight. Phase 1 of Sisters of Battle is identical to Phase 1 of Mantis Lords.
First encountered in the Pantheon of Hallownest, they are a form of the Mantis Lords where all three sisters battle together instead of separately. The Sisters of Battle are a quest boss in Hollow Knight introduced in Godmaster.