Hellcarver Demon [Rise of the Eldrazi] Metal[-20] You can only use this

You can only use this effect of "Knightmare Gryphon" once per turn

except "Donpa

Heroic — Whenever you cast a spell that targets Fabled Hero

Set: Amonkhet Prerelease Promos Type: Instant // Sorcery Rarity: Rare Cost: {1}{W} // {3}{G} Untap target creature

Hellcarver Demon [Rise of the Eldrazi] Metal[-20] You can only use thisSet: Rise of the Eldrazi Type: Creature Demon Rarity: Mythic Cost: {3}{B}{B}{B} Flying Whenever Hellcarver Demon deals combat damage to a player, sacrifice all other permanents you control and discard your hand. Exile the top six cards of your library. You may cast any number of spells from among cards exiled this way without paying their mana costs.