Sigilyph GX

If this Pokémon is your Active Pokémon and is damaged by an attack from your opponent's Pokémon-GX or Pokémon-EX (even if this Pokémon is Knocked Out), put damage counters on the Attacking Pokémon equal to the damage done to this Pokémon.

Psychic, Colorless, Colorless · This attack's damage isn't affected by Resistance.

Psychic, Colorless, Colorless · This attack does 60 damage times the amount of Energy attached to your opponent's Active Pokémon. (You can't use more than 1 GX attack in a game.)