Spawn of the Abyss

Haste, Flying
Whenever Spawn of the Abyss attacks, discard a card from your hand and put a +1/+0 counter on Spawn of the Abyss.
When Spawn of the Abyss dies, deal X damage to target creature or player, where X is equal to the amount of +1/+0 counters on Spawn of the
Abyss.