World at War [The List] Elemental Hydra and his prized prisoners: Strong

and his prized prisoners: Strong and Rex

[the card types are Artifacts

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

and mana of any type can be spent to cast those spells

World at War [The List] Elemental Hydra and his prized prisoners: StrongSet: 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.)