Absolute Victory

Whenever a creature an opponent controls would
be placed in their graveyard during your turn,
put a triumph counter on Triumphant Victory.
Do this no more than once for each of your turns.
Attacking creatures you cobtrol get +X/+0 until
end of turn, and defending creatures you control
get +0/+X until end of turn where X is equal to
the number of triumph counters currently on Triumphant Victory.