Tahl gets -1 power for each captivity counter on her.
Put 1 captivity counter on Tahl Gain 2 Force. Play only during your build step.
Pay 2 Force Absorb 2
Keywords
Damage Control
Damage Control X: A cumulative, triggered ability that means, "When your build step starts, you may remove up to X damage counters from this unit."
Absorb
Absorb X: An activated ability that means, "Prevent up to X damage to this unit, and it gains power for its next attack equal to the amount of damage prevented this way."