Halflar, Elven Scoundrel

Trample
Whenever Halfar, Elven Scoundrel attacks, each opponent discards a card. If a creature spell was discarded this way, this creature gets a +1/+1 counter.
{b/g}{t}, Remove a +1/+1 counter from Halfar, Elven Scoundrel: Target creature gets a -1/-1 counter. It's controller discards a card.