M:tG card similarity search
2R · Legendary Creature — Dragon Shaman
Whenever you cast a noncreature spell, target creature gets +X/+0 until end of turn, where X is that spell's mana value. Choose a Background (You can have a Background as a second commander.) 1/3
| Name | Mana | Type | Text | 
|---|---|---|---|
| Cloudkill | 4BB | Sorcery | All creatures get -X/-X until end of turn, where X is the greatest mana value of a commander you own on the battlefield or in the command zone. | 
| Disrupting Shoal | XUU | Instant — Arcane | You may exile a blue card with mana value X from your hand rather than pay this spell's mana cost. Counter target spell if its mana value is X. | 
| Sickening Shoal | XBB | Instant — Arcane | You may exile a black card with mana value X from your hand rather than pay this spell's mana cost. Target creature gets -X/-X until end of turn. | 
| Shark Typhoon | 5U | Enchantment | Whenever you cast a noncreature spell, create an X/X blue Shark creature token with flying, where X is that spell's mana value. Cycling {X}{1}{U} ({X}{1}{U}, Discard this card: Draw a card.) When you cycle Shark Typhoon, create an X/X blue Shark creature token with flying. | 
| Kindred Denial | 2UU | Instant | Counter target spell. Seek a card with the same mana value as that spell. | 
| Tangleweave Armor | 2GG | Artifact — Equipment | Living weapon (When this Equipment enters the battlefield, create a 0/0 black Phyrexian Germ creature token, then attach this to it.) Equipped creature gets +X/+X, where X is the greatest mana value among your commanders. Equip {4} | 
| Mystic Genesis | 2GUU | Instant | Counter target spell. Create an X/X green Ooze creature token, where X is that spell's mana value. | 
| Up the Beanstalk | 1G | Enchantment | When Up the Beanstalk enters the battlefield and whenever you cast a spell with mana value 5 or greater, draw a card. | 
| Cloudhoof Kirin | 3UU | Legendary Creature — Kirin Spirit | Flying Whenever you cast a Spirit or Arcane spell, you may have target player mill X cards, where X is that spell's mana value. 4/4 | 
| Cankerous Thirst | 3B/G | Instant | If {B} was spent to cast this spell, you may have target creature get -3/-3 until end of turn. If {G} was spent to cast this spell, you may have target creature get +3/+3 until end of turn. (Do both if {B}{G} was spent.) |