Nami, the Tidecaller

Whenever a creature is tapped and is not attacking,
Nami deals damage to that creature equal the total toughness of all creatures you control.
{g/u}{g/u}{t} Tap target permanent. Untap target permanent.
{u}{g}{3} Target creature gets a +1/+1 counter, then proliferate.
{u}{g}{4} Adapt 4. (If this creature has no +1/+1
counters on it, put four +1/+1 counters on it.)