Zapati, The Big Menace

Trample, Banding, Flanking, Vigilance
Whenever you cast a spell, put charge
counters equal to its mana cost on Zapati.
{3}, {t}: Zapati deals {x} damage to any target,
where x is the number of counters on Zapati.
Remove 2 charge counters from Zapati: Switch
Zapati's power and toughness until end of turn.