Nasus, the Bonk God

When Nasus, the Bonk God enters to the battlefield put a +1/+1 counter on it.
{1}: Nasus, the Bonk God deals damage equal to its power to target creature, if it dies, double the numbre of counters on
Nasus, the Bonk God. Each time you use this ability, it's mana cost is increased by {1} until the end of the turn.