As long as Dark Tyranitar is your Active Pokémon, put 1 damage counter on each of your opponent's Benched Basic Pokémon between turns. You can't use more than 1 Sand Damage Poké-Body between turns.

Second Strike50+

If the Defending Pokémon already has at least 2 damage counters on it, this attack does 50 damage plus 20 more damage.