Parasyte

Hexproof, Devoid (this card has no color)
Enchant target creature, it gains the following
and keeps the enchantment when it dies:
{3}{t} attack target player and gain double strike
and a +1/+0 for each creature that blocks your
attack
Undying 3 (when this creature dies, if it had no
+3/+3 counters on it, return it to the battlefield
under its owner's control with a +3/+3 counter
on it.)