Nergigante, Extinction Dragon

Haste, First-strike, Flying

Whenever Nergigante, Extinction Dragon enters the battlefield, you may have it fight
up to one target creature.

When this card deals combat damage to a dragon,
it gains +X/+X where X is the power of the
creature until the end of the turn. If Nergigante, Extinction Dragon destroyed a dragon creature
this turn, it instead gains X +1/+1 counters.