Touching of the Hulks

All creatures on all battlefields are Hulk creatures
in addition to thier regular types.
All Hulk creatures you control gain +2/+2
for each Hulk creature on all battlefields
{x}, {t}, : Create {x} 1/1 Hulk creature tokens
{x}, {ut}, : Sacrifice {x} Hulk creature tokens, All opponents lose {x} Life and you gain half of {x} Life