Orphans of Ravnica

This creature can't block, attack or be sacrificed.
When Orphans of Ravnica enters the battlefield,
put two +1/+1 counters on target creature and it
has Retribution. (Whenever a creature you control
dies, put a +1/+1 counter on this creature.This effect
lasts indefinitely.)
Backup 10 (When this creature dies, create ten 1/1 creature tokens that share all types and colors with this creature.)