Phanthon, of Murr's Shrine

Whenever another creature you control dies, if it
didn't have a spirit counter on it, return it to the battlefield with a spirit counter on it.
Creatures you control that have a spirit counter
are spirits in addition to their other types. When
a creature you control with a spirit counter,
attacks or blocks, sacrifice it
{b/g}{g/u}{u/b}: Spirits you control get +1/+1
until end of turn