Blessed Soulcaller

Flying
Whenever a creature you own is put into a
graveyard, you may pay {2}. If you do, return it
to the battlefield attached to target creature you
control. It's an enchantment aura with
"Enchanted creature has all abilities this had as
a creature and gets +X/+Y, where X was this
creature's power and Y was this creature's
toughness." (It's no longer a creature.)