Kirei, Phony Priest

+1: Until the start of your next turn, creatures can't attack unless their controller pays 2 life for each creature they control that's attacking.
-3: Target creature deals damage to another target creature equal to its power. Then, place a -1/-1 counter on the first creature.
-6: At the start of your 3rd upkeep from this ability's activation: all players sacrifice all other permanents they control and discard their hand.