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 |
|---|---|---|---|
| Nyx Infusion | 2B | Enchantment — Aura | Enchant creature Enchanted creature gets +2/+2 as long as it's an enchantment. Otherwise, it gets -2/-2. |
| Fungal Infection | B | Instant | Target creature gets -1/-1 until end of turn. Create a 1/1 green Saproling creature token. |
| Bogardan Rager | 5R | Creature — Elemental | Flash (You may cast this spell any time you could cast an instant.) When Bogardan Rager enters the battlefield, target creature gets +4/+0 until end of turn. 3/4 |
| Den of the Bugbear | Land | If you control two or more other lands, Den of the Bugbear enters the battlefield tapped. {T}: Add {R}. {3}{R}: Until end of turn, Den of the Bugbear becomes a 3/2 red Goblin creature with "Whenever this creature attacks, create a 1/1 red Goblin creature token that's tapped and attacking." It's still a land. | |
| Chaos Harlequin | 2RR | Creature — Human | {R}: Exile the top card of your library. If that card is a land card, Chaos Harlequin gets -4/-0 until end of turn. Otherwise, Chaos Harlequin gets +2/+0 until end of turn. 2/4 |
| Tenth District Guard | 1W | Creature — Human Soldier | When Tenth District Guard enters the battlefield, target creature gets +0/+1 until end of turn. 2/2 |
| Antarctic Research Base | Plane — Earth | When you planeswalk to Antarctic Research Base and at the beginning of your upkeep, investigate. Whenever chaos ensues, put X +1/+1 counters on target creature you control, where X is the number of artifacts you control. It becomes a Plant in addition to its other types. | |
| Reckless Charge | R | Sorcery | Target creature gets +3/+0 and gains haste until end of turn. Flashback {2}{R} (You may cast this card from your graveyard for its flashback cost. Then exile it.) |
| Gateway Shade | 2B | Creature — Shade | {B}: Gateway Shade gets +1/+1 until end of turn. Tap an untapped Gate you control: Gateway Shade gets +2/+2 until end of turn. 1/1 |
| Glade Gnarr | 5G | Creature — Beast | Whenever a player casts a blue spell, Glade Gnarr gets +2/+2 until end of turn. 4/4 |