Catalyst Stone [Odyssey] XY154 you may remove any number

you may remove any number of +1/+1 counters from Tetravus

Whenever an opponent sacrifices a nontoken permanent

You can pay 1000 Life Points to negate the activation of a Spell or Trap Card that targets exactly 1 Psychic-Type monster

inflict damage to your opponent's Life Points equal to the original ATK of the destroyed monster

and Whimsicott VSTAR find themselves wielding awesome new VSTAR Powers

Catalyst Stone [Odyssey] XY154 you may remove any numberSet: Odyssey Type: Artifact Rarity: Rare Cost: {2} Flashback costs you pay cost up to {2} less. Flashback costs your opponents pay cost {2} more. The gems' incandescence invades the dreams of all who see them.