At the beginning of your upkeep, you may have target creature you control get +X/+X until end of turn, where X is the number of creatures you control. If you do, sacrifice that creature at the beginning of the next end step.
Cast this spell only before the combat damage step.
Target creature gains trample and gets +X/+0 until end of turn, where X is its power. At the beginning of the next end step, destroy that creature if it attacked this turn.
Flying
As this creature enters, sacrifice any number of creatures. This creature's power becomes the total power of those creatures and its toughness becomes their total toughness.
: This creature gets +1/+0 until end of turn.
