Defeat Illfang the Kobold Lord

Defeat Illfang the Kobold Lord enters the battlefield with ten quest counters.
At the beginning of combat on your turn, you
may tap any number of untapped creatures you
control. For each creature you tap, remove Quest
counters from this equal to its power. When the
last quest counter is removed, you gain an
experience counter, put a +1/+1 counter on up to
one target creature, and sacrifice Defeat Illfang the
Kobold Lord.