M:tG card similarity search
3R · Enchantment
At the beginning of each upkeep, count the number of permanents. If the number is odd, until end of turn, red creatures get +1/+1 and whenever a player taps a Mountain for mana, that player adds an additional {R}. If the number is even, until end of turn, red creatures get -1/-1 and if a player taps a Mountain for mana, that Mountain produces colorless mana instead of any other type.
| Name | Mana | Type | Text |
|---|---|---|---|
| Sea Hag | 4U | Creature — Hag | When Sea Hag enters the battlefield, creatures your opponents control get -4/-0 until end of turn. 3/5 |
| Surge of Strength | RG | Instant | As an additional cost to cast this spell, discard a red or green card. Target creature gains trample and gets +X/+0 until end of turn, where X is that creature's mana value. |
| Steelclaw Lance | BR | Artifact — Equipment | Equipped creature gets +2/+2. Equip Knight {1} Equip {3} |
| Vulshok Heartstoker | 2R | Creature — Human Shaman | When Vulshok Heartstoker enters the battlefield, target creature gets +2/+0 until end of turn. 2/2 |
| Phyrexian Driver | 2B | Creature — Phyrexian Zombie Mercenary | When Phyrexian Driver enters the battlefield, other Mercenary creatures get +1/+1 until end of turn. 1/1 |
| Halam Djinn | 5R | Creature — Djinn | Haste Halam Djinn gets -2/-2 as long as red is the most common color among all permanents or is tied for most common. 6/5 |
| Aspirant's Ascent | U | Instant | Until end of turn, target creature gets +1/+3 and gains flying and toxic 1. (Players dealt combat damage by that creature also get a poison counter.) |
| Aggressive Urge | 1G | Instant | Target creature gets +1/+1 until end of turn. Draw a card. |
| Defiant Strike | W | Instant | Target creature gets +1/+0 until end of turn. Draw a card. |
| Sudden Strength | 3G | Instant | Target creature gets +3/+3 until end of turn. Draw a card. |