Kacchan, Master of Explosions

Haste
Whenever Kacchan, Master of Explosions attacks, put a Nitro counter on it.
You may exert Kacchan as it attacks. When
you do, put two Nitro counters on it.
{r}, {t}: Kacchan deals damage equal to the number of Nitro counters on it multiplied
by two. Remove all Nitro counters on
Kacchan.