Shagaru Magala

Flying, Menace
When Shagaru Magala enters the battlefield, if
you control Gore Magala, sacrifice it. Gain +1/+1
counters equal to the power of Gore Magala.
At the beginning of your upkeep all creatures you
do not control get a -1/-1 counter and creatures
you control get a +1/+1 counter. If Shagaru
Magala's power becomes 20 or more this way you
win the game.