M:tG card similarity search
1RR · Enchantment
Blue creatures don't untap during their controllers' untap steps. At the beginning of each player's upkeep, that player may choose any number of tapped blue creatures they control and pay {4} for each creature chosen this way. If the player does, untap those creatures.
| Name | Mana | Type | Text |
|---|---|---|---|
| Corridor Monitor | 1U | Artifact Creature — Construct | When Corridor Monitor enters the battlefield, untap target artifact or creature you control. 1/4 |
| Divine Reckoning | 2WW | Sorcery | Each player chooses a creature they control. Destroy the rest. Flashback {5}{W}{W} (You may cast this card from your graveyard for its flashback cost. Then exile it.) |
| Breaching Hippocamp | 3U | Creature — Horse Fish | Flash (You may cast this spell any time you could cast an instant.) When Breaching Hippocamp enters the battlefield, untap another target creature you control. 3/2 |
| Riches | 5UU | Sorcery | Aftermath (Cast this spell only from your graveyard. Then exile it.) Each opponent chooses a creature they control. You gain control of those creatures. |
| Stinging Lionfish | 1U | Enchantment Creature — Fish | Whenever you cast your first spell during each opponent's turn, you may tap or untap target nonland permanent. 2/1 |
| Meria, Scholar of Antiquity | 1RG | Legendary Creature — Elf Artificer | Tap an untapped nontoken artifact you control: Add {G}. Tap two untapped nontoken artifacts you control: Exile the top card of your library. You may play it this turn. 3/3 |
| Tidal Bore | 1U | Instant | You may return an Island you control to its owner's hand rather than pay this spell's mana cost. You may tap or untap target creature. |
| Caetus, Sea Tyrant of Segovia | Legendary Creature — Serpent | Noncreature spells you cast have convoke. (Your creatures can help cast those spells. Each creature you tap while casting a noncreature spell pays for {1} or one mana of that creature's color.) At the beginning of your end step, untap up to four target creatures. 3/3 | |
| Well of Life | 4 | Artifact | At the beginning of your end step, if you control no untapped lands, you gain 2 life. |
| Pine Walker | 3GG | Creature — Elemental | Morph {4}{G} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up any time for its morph cost.) Whenever Pine Walker or another creature you control is turned face up, untap that creature. 5/5 |