Exeros the Guardian

Heal {x} when played. Blocking doesn’t
Tap. For each creature blocked add a
Neutral counter to Exeros when he
Reaches 6 counters he is destroyed and
Becomes undead and stays in play but
Can only attack. If Adawolf is in play
Sacrifice Adawolf to resurrect Exeros and
Up to two other creatures in the graveyard.