Gunhild, The Bloodthirsty

First strike, haste
Players can't gain life.
Gunhild, The Bloodthirsty gets +1/+1 for each experience counter you have.
Whenever a creature you control deals combat
damage to a player, flip a coin. If you win, gain
an experience counter.
{p/r}{p/r}{p/r}: Gunhild deals damage to each player
equal to its power.