M:tG card similarity search
2R · Enchantment
Whenever you cast a multicolored spell, Mana Cannons deals X damage to any target, where X is the number of colors that spell is.
| Name | Mana | Type | Text | 
|---|---|---|---|
| Pygmy Giant | 1RR | Creature — Giant | {R}, {T}, Sacrifice a creature: Pygmy Giant deals X damage to target creature, where X is a number in the sacrificed creature's text box. 0/2 | 
| How Is This a Par Three?! | 2UU | Enchantment | Whenever you cast a spell, you may have target player mill X cards, where X is the number of words in that spell's name. | 
| Devil's Play | XR | Sorcery | Devil's Play deals X damage to any target. Flashback {X}{R}{R}{R} (You may cast this card from your graveyard for its flashback cost. Then exile it.) | 
| Niv-Mizzet, Guildpact | WUBRG | Legendary Creature — Dragon Avatar | Flying, hexproof from multicolored Whenever Niv-Mizzet, Guildpact deals combat damage to a player, it deals X damage to any target, target player draws X cards, and you gain X life, where X is the number of different color pairs among permanents you control that are exactly two colors. 6/6 | 
| Consume Spirit | X1B | Sorcery | Spend only black mana on X. Consume Spirit deals X damage to any target and you gain X life. | 
| Synchronized Spellcraft | 4R | Instant | Synchronized Spellcraft deals 4 damage to target creature and X damage to that creature's controller, where X is the number of creatures in your party. (Your party consists of up to one each of Cleric, Rogue, Warrior, and Wizard.) | 
| Thunder of Hooves | 3R | Sorcery | Thunder of Hooves deals X damage to each creature without flying and each player, where X is the number of Beasts on the battlefield. | 
| Conflagrate | XXR | Sorcery | Conflagrate deals X damage divided as you choose among any number of targets. Flashback—{R}{R}, Discard X cards. (You may cast this card from your graveyard for its flashback cost. Then exile it.) | 
| Concert Kaboomist | 1RR | Creature — Goblin Artificer | Trample When Concert Kaboomist enters the battlefield or is turned face up, it deals X damage to target opponent, where X is the number of noncreature spells you've cast since the beginning of your last turn. Disguise {R} 4/2 | 
| Banshee | 2BB | Creature — Spirit | {X}, {T}: Banshee deals half X damage, rounded down, to any target, and half X damage, rounded up, to you. 0/1 |