Dragonlord of Akroa

Flying, Trample, Haste, Double-Strike
When Dragonlord of Akroa enters the battlefield, it deals 2 damage to each other creature. For each creature that is dealt damage this way, put a +1/+1 counter on Dragonlord of Akroa.
If a -1/-1 counter would be placed on Dragonlord of Akroa, put a +1/+1 counter on it instead.