Lorkadiu, between Worlds

Lorkadiu, between Worlds enters the battlefield
with a +1/+1 counter, equal to your devotion to
white, black or green.
As long as your devotion to white, black or green
is 9 or more, Lorkadiu has the ability: Remove a
+1/+1 counter from a creature you control, target opponent loses 1 life, you gain 1 life.
Other creatures you control have undying.