Gunhild, The Bloodthirsty

First strike, haste
Gunhild, The Bloodthirsty gets +1/+1 for each experience counter you have.
At the beginning of your the end step, flip a coin
for each creature that attacked this turn, for each
winning coin flip gain an experience counter.
{p/r}{p/r}{p/r}{p/r}{p/r}: Gunhild deals damage to each player
equal to its power. This ability can not be
effected by lifelink