Ethys, Jungle Champion

Empower (Whenever this creature attacks with two
or more other creatures, put a +1/+1 counter on it. It
becomes empowered for the rest of the game if it is not
already empowered.)
Empowered creatures you control have trample.
As long as Ethys is empowered she has double
strike and "Whenever this creature deals combat
damage to a player, draw a card and lose 1 life."