Nanbo, the Pygmy

Whenever a spell, an activated ability or a triggered ability is played more than once each turn, exile it. Then, put a +1/+1 counter on Nanbo, the Pygmy.
Whenever a source deals damage to an opponent,
it deals that much damage plus 1 for each +1/+1 counters on Nanbo.
Sacrifice X +1/+1 counters: Return a red instant
or sorcery card from your graveyard to your hand
with converted mana cost X.