Rillaboom VMAX - SV106 - Holofoil Shining Fates Shiny Vault - Shiny Holo Rare

You may discard up to 3 Grass Energy from this Pokémon. If you do, this attack does 50 more damage for each card you discarded in this way.

VMAX rule: When your Pokémon VMAX is Knocked Out, your opponent takes 3 Prize cards.