As an additional cost to cast this spell, sacrifice an artifact. Search your library for an artifact card with mana value X or less, put it onto the battlefield, then shuffle.
Flying {2}: Steel Hellkite gets +1/+0 until end of turn. {X}: Destroy each nonland permanent with mana value X whose controller was dealt combat damage by Steel Hellkite this turn. Activate only once each turn. 5/5
All Slivers have “At the beginning of your upkeep, this permanent deals 1 damage to you.” 5/5
Enrage — Whenever Silverclad Ferocidons is dealt damage, each opponent sacrifices a permanent. 8/5
Improvise (Your artifacts can help cast this spell. Each artifact you tap after you’re done activating mana abilities pays for {1}.) Search your library for an artifact card with mana value X or less, put it onto the battlefield, then shuffle.
Each instant and sorcery card in your graveyard gains flashback until end of turn. The flashback cost is equal to its mana cost. Flashback {4}{R} (You may cast this card from your graveyard for its flashback cost. Then exile it.)
Reach, haste Whenever Robber of the Rich attacks, if defending player has more cards in hand than you, exile the top card of their library. During any turn you attacked with a Rogue, you may cast that card and you may spend mana as though it were mana of any color to cast that spell. 2/2
Equipped creature gets +1/+0. Equip {0} ({0}: Attach to target creature you control. Equip only as a sorcery.)
You may tap or untap target permanent, then you may tap or untap another target permanent. Cipher (Then you may exile this spell card encoded on a creature you control. Whenever that creature deals combat damage to a player, its controller may cast a copy of the encoded card without paying its mana cost.)
Trample, haste Whenever Eivor, Wolf-Kissed deals combat damage to a player, you mill that many cards. You may put a Saga card and/or a land card from among them onto the battlefield. 7/6
At the beginning of your upkeep, you may look at the top card of your library. If it’s a creature card, you may reveal it and put a quest counter on Quest for Ula’s Temple. At the beginning of each end step, if there are three or more quest counters on Quest for Ula’s Temple, you may put a Kraken, Leviathan, Octopus, or Serpent creature card from your hand onto the battlefield.
Enchant land Whenever enchanted land is tapped for mana, its controller adds an additional {G}.
Choose one — • Abrade deals 3 damage to target creature. • Destroy target artifact.
+1: Until end of turn, up to one target creature gets +2/+2 and gains vigilance and haste. 0: Create a 2/2 green Wolf creature token. Transform Arlinn Kord. Loyalty: 3 Arlinn, Embraced by the Moon Legendary Planeswalker — Arlinn +1: Creatures you control get +1/+1 and gain trample until end of turn. −1: Arlinn, Embraced by the Moon deals 3 damage to any target. Transform Arlinn, Embraced by the Moon. −6: You get an emblem with “Creatures you control h...