Ravenous Eel

Discard a creature card or sacrifice a creature: If
that card has flying, put a flying counter on this
card. The same is true for first strike,
double strike, deathtouch, indestructible,
lifelink, menace, hexproof, infect, toxic, skulk,
and trample. If that card also has greater power
than this card, put a +1/+1 counter on this
creature