Dragon's Claw [Duel Decks: Knights vs. Dragons]

Dragon's Claw [Duel Decks: Knights vs. Dragons]Set: Duel Decks: Knights vs. Dragons Type: Artifact Rarity: Uncommon Cost: {2} Whenever a player casts a red spell, you may gain 1 life. Though no longer attached to the hand, it still holds its adversary in its grasp.

Set: Innistrad Type: Sorcery Rarity: Rare Cost: {X}{R} Devil's Play deals X damage to any target

Return Tatsumasa to the battlefield under its owner's control when that token dies

I have witnessed both

Set: Rise of the Eldrazi Type: Creature — Merfolk Wizard Rarity: Uncommon Cost: {U} Level up {1}{U} ({1}{U}: Put a level counter on this

Set: Commander 2017 Type: Enchantment Rarity: Uncommon Cost: {2}{G} Whenever a creature with power 3 or greater enters the battlefield under your control

an unstable time stream makes wizards want to tinker with it even more

counter that spell unless that player pays {X}

Arrows fletched with the feathers of angels seldom miss their mark

Set: Welcome Deck 2016 Type: Creature — Angel Rarity: Rare Cost: {4}{W}{W} Flying (This creature can't be blocked except by creatures with flying or reach

Set: Kaladesh Prerelease Promos Type: Creature — Demon Rarity: Mythic Cost: {3}{B}{B}{B} Flying

Dromoka mage

where X is the total mana value of all cards revealed this way