Acumen of Strength

Acumen of Strength doesn't untap during your
untap step.
{1},{t}: Put a strength counter on Acumen of
Strength. Until end of turn, Creatures you
control gain +X/+X, creatures your oppnents
control lose -X/-X, where X is the number of
strength counters on Acumen of Strength.
Pay 1 + 2X life: Untap Acumen of Strength,
where X is it's number of Strength counters.