Dean, Entity of Death

Deathtouch, Firststrike, Vigilance.
Each entity has +1/+1.
This enters with X +1/+1 counters on it.
When Dean enters, destroy all other non-entity creatures with power X or less. They can’t be regenerated.
{t}: Return any number of creatures with combined mana value X or less from graveyards to the battlefield under their owner’s control, where X is Dean’s power.