World at War [The List] Elemental Hydra we were able to convert

we were able to convert sky-dock assisters into a defense system for the Aether Spire

[the card types are Artifacts

Activate only as a sorcery and only if an opponent has eight or more cards in their graveyard

Set: Modern Horizons 3 Commander Type: Creature — Lhurgoyf Rarity: Rare Cost: {3}{R} Pyrogoyf's power is equal to the number of card types among cards in all graveyards and its toughness is equal to that number plus 1

World at War [The List] Elemental Hydra we were able to convertSet: The List Type: Sorcery Rarity: Rare Cost: {3}{R}{R} After the first postcombat main phase this turn, there's an additional combat phase followed by an additional main phase. At the beginning of that combat, untap all creatures that attacked this turn. Rebound (If you cast this spell from your hand, exile it as it resolves. At the beginning of your next upkeep, you may cast this card from exile without paying its mana cost.)