Pay 4 Force One of your units with an Equipment attached gets Double Damage for this attack. If damage from this unit's attack causes one of your opponent's units to be discarded, this unit gets +2 power for its next attack.
Keywords
Double Damage
Double Damage: An isolated, static ability played during the damage placement POP that means, "Put 1 additional damage counter on the defending unit for each 1 damage that wasn't prevented." Damage counters placed by a unit with Double Damage are in addition to the counters that would be placed normally if the attacking unit did not have Double Damage.