M:tG card similarity search
1U · Creature — Frog
Each creature spell you cast costs {1} less to cast if it has mutate. Whenever you cast a creature spell, if it has mutate, draw a card, then discard a card. 1/3
| Name | Mana | Type | Text | 
|---|---|---|---|
| Thornscape Familiar | 1G | Creature — Insect | Red spells and white spells you cast cost {1} less to cast. 2/1 | 
| Herald of Kozilek | 1UR | Creature — Eldrazi Drone | Devoid (This card has no color.) Colorless spells you cast cost {1} less to cast. 2/4 | 
| Naiad of Hidden Coves | 2U | Enchantment Creature — Nymph | As long as it's not your turn, spells you cast cost {1} less to cast. 2/3 | 
| Grand Arbiter Augustin IV | 2WU | Legendary Creature — Human Advisor | White spells you cast cost {1} less to cast. Blue spells you cast cost {1} less to cast. Spells your opponents cast cost {1} more to cast. 2/3 | 
| Ruby Medallion | 2 | Artifact | Red spells you cast cost {1} less to cast. | 
| Hollow One | 5 | Artifact Creature — Golem | This spell costs {2} less to cast for each card you've cycled or discarded this turn. Cycling {2} ({2}, Discard this card: Draw a card.) 4/4 | 
| Keeper of the Secret Lair | 1U | Legendary Creature — Merfolk Rogue | Flash You may cast Secret Lair spells as though they had flash. Secret Lair spells you cast cost {1} less to cast. 2/1 | 
| Obscuring Aether | G | Enchantment | Face-down creature spells you cast cost {1} less to cast. {1}{G}: Turn Obscuring Aether face down. (It becomes a 2/2 creature.) | 
| Centaur Omenreader | 3G | Snow Creature — Centaur Shaman | As long as Centaur Omenreader is tapped, creature spells you cast cost {2} less to cast. 3/3 | 
| Jet Medallion | 2 | Artifact | Black spells you cast cost {1} less to cast. |