We have no guide price to show for this card - either it trades too rarely to track, or our sources cannot price it right now. The live listings below are the best market signal.
Does 10 damage plus 10 more damage for each Energy attached to Dark Tyranitar.
Does 20 damage to each of your opponent's Pokémon. (Don't apply Weakness and Resistance for Benched Pokémon.)
If the Defending Pokémon is Pokémon-ex, this attack does 70 damage plus 50 more damage.