M:tG card similarity search
5 · Artifact
As Seal of the Guildpact enters the battlefield, choose two colors. Each spell you cast costs {1} less to cast for each of the chosen colors it is.
| Name | Mana | Type | Text |
|---|---|---|---|
| Addle | 1B | Sorcery | Choose a color. Target player reveals their hand and you choose a card of that color from it. That player discards that card. |
| March of Burgeoning Life | XG | Instant | As an additional cost to cast this spell, you may exile any number of green cards from your hand. This spell costs {2} less to cast for each card exiled this way. Choose target creature with mana value less than X. Search your library for a creature card with the same name as that creature, put it onto the battlefield tapped, then shuffle. |
| This Town Ain't Big Enough | 4U | Instant | This spell costs {3} less to cast if it targets a permanent you control. Return up to two target nonland permanents to their owners' hands. |
| Apex Observatory | Artifact | Apex Observatory enters the battlefield tapped. As it enters, choose a card type shared among two exiled cards used to craft it. {T}: The next spell you cast this turn of the chosen type can be cast without paying its mana cost. | |
| Psychic Allergy | 3UU | Enchantment | As Psychic Allergy enters the battlefield, choose a color. At the beginning of each opponent's upkeep, Psychic Allergy deals X damage to that player, where X is the number of nontoken permanents of the chosen color they control. At the beginning of your upkeep, destroy Psychic Allergy unless you sacrifice two Islands. |
| Cavern of Souls | Land | As Cavern of Souls enters the battlefield, choose a creature type. {T}: Add {C}. {T}: Add one mana of any color. Spend this mana only to cast a creature spell of the chosen type, and that spell can't be countered. | |
| Riptide Replicator | X4 | Artifact | As Riptide Replicator enters the battlefield, choose a color and a creature type. Riptide Replicator enters the battlefield with X charge counters on it. {4}, {T}: Create an X/X creature token of the chosen color and type, where X is the number of charge counters on Riptide Replicator. |
| Machine Over Matter | 1U | Instant | This spell costs {1} less to cast if you control an artifact creature. Return target nonland permanent to its owner's hand. |
| Heartstone | 3 | Artifact | Activated abilities of creatures cost {1} less to activate. This effect can't reduce the mana in that cost to less than one mana. |
| Ruby Leech | 1R | Creature — Leech | First strike Red spells you cast cost {R} more to cast. 2/2 |