Maelstrom Nexus [Double Masters]Set: Double Masters Type: Enchantment Rarity: Mythic Cost: {W}{U}{B}{R}{G} The first spell you cast each turn has cascade. (When you cast your first spell, exile cards from the top of your library until you exile a nonland card that costs less. You may cast it without paying its mana cost. Put the exiled cards on the bottom of your library in a random order.)

If carnage gets more votes

only the chosen can wield it and live

Set: Eighth Edition Type: Creature — Illusion Rarity: Rare Cost: {2}{U} Flying (This creature can't be blocked except by creatures with flying or reach

Set: Scars of Mirrodin Type: Artifact Creature — Myr Construct Rarity: Rare Cost: {7} When Myr Battlesphere enters the battlefield

Set: Duel Decks Anthology Type: Creature — Insect Rarity: Uncommon Cost: {G} Return an Elf you control to its owner's hand: Untap target creature

Set: Planechase Anthology Planes Type: Plane — Dominaria Rarity: Common Any time you could cast a sorcery

Whenever a player loses the game

Set: Shadowmoor Type: Instant Rarity: Common Cost: {R} Target creature becomes red and gains haste until end of turn

Metal Rarity: Uncommon

Whenever an artifact you control is put into a graveyard from the battlefield

Set: Legendary Collection Type: Grass Rarity: Uncommon Retreat cost: Colorless

Set: Kaladesh Prerelease Promos Type: Sorcery Rarity: Rare Cost: {X}{X}{G} Return X target cards from your graveyard to your hand