Counter target spell. At the beginning of your next upkeep, pay {3}{U}{U}. If you don't, you lose the game.

Arcane Life-support — If you would lose the game, instead exile The Golden Throne and your life total becomes 1. A Thousand Souls Die Every Day — {T}, Sacrifice a creature: Add three mana in any combination of colors.

You may play an additional land on each of your turns. Whenever you play a land or cast a spell, draw a card if you have no cards in hand. Otherwise, discard a card.

Create a 4/4 red Giant creature token. At the beginning of your next upkeep, pay {4}{R}. If you don't, you lose the game.

Flying

If you would lose the game, instead shuffle your hand, your graveyard, and all permanents you own into your library, then draw seven cards and your life total becomes 20.

Equipped creature gets +0/+3. Equip {3} ({3}: Attach to target creature you control. Equip only as a sorcery.)