M:tG card similarity search
1U · Creature — Siren
Flash Flying When Threnody Singer enters the battlefield, target creature an opponent controls gets -X/-0 until end of turn, where X is your devotion to blue. (Each {U} in the mana costs of permanents you control counts toward your devotion to blue.) 1/3
| Name | Mana | Type | Text |
|---|---|---|---|
| Karoo | Land | Karoo enters the battlefield tapped. When Karoo enters the battlefield, sacrifice it unless you return an untapped Plains you control to its owner's hand. {T}: Add {C}{W}. | |
| Acid Web Spider | 3GG | Creature — Spider | Reach When Acid Web Spider enters the battlefield, you may destroy target Equipment. 3/5 |
| Aven Warcraft | 2W | Instant | Creatures you control get +0/+2 until end of turn. Threshold — If seven or more cards are in your graveyard, choose a color. Creatures you control also gain protection from the chosen color until end of turn. |
| Loch Dragon | U/RU/RU/RU/R | Creature — Dragon | Flying Whenever Loch Dragon enters the battlefield or attacks, you may discard a card. If you do, draw a card. 3/2 |
| Armored Guardian | 3WU | Creature — Cat Soldier | {1}{W}{W}: Target creature you control gains protection from the color of your choice until end of turn. {1}{U}{U}: Armored Guardian gains shroud until end of turn. (It can't be the target of spells or abilities.) 2/5 |
| Prismatic Geoscope | 5 | Artifact | Prismatic Geoscope enters the battlefield tapped. Domain — {T}: Add X mana in any combination of colors, where X is the number of basic land types among lands you control. |
| War Dance | G | Enchantment | At the beginning of your upkeep, you may put a verse counter on War Dance. Sacrifice War Dance: Target creature gets +X/+X until end of turn, where X is the number of verse counters on War Dance. |
| Regent's Authority | W | Instant | Target creature gets +2/+2 until end of turn. If it's an enchantment creature or legendary creature, instead put a +1/+1 counter on it and it gets +1/+1 until end of turn. |
| Polymorphist's Jest | 1UU | Instant | Until end of turn, each creature target player controls loses all abilities and becomes a blue Frog with base power and toughness 1/1. |
| Karazikar, the Eye Tyrant | 3BR | Legendary Creature — Beholder | Whenever you attack a player, tap target creature that player controls and goad it. (Until your next turn, that creature attacks each combat if able and attacks a player other than you if able.) Whenever an opponent attacks another one of your opponents, you and the attacking player each draw a card and lose 1 life. 5/5 |