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 |
|---|---|---|---|
| Blacksmith's Skill | W | Instant | Target permanent gains hexproof and indestructible until end of turn. If it's an artifact creature, it gets +2/+2 until end of turn. |
| Breach | 2B | Instant | Target creature gets +2/+0 and gains fear until end of turn. (It can't be blocked except by artifact creatures and/or black creatures.) |
| Crenellated Wall | 4 | Artifact Creature — Wall | Defender (This creature can't attack.) {T}: Target creature gets +0/+4 until end of turn. 0/4 |
| Snarling Undorak | 2GG | Creature — Beast | {2}{G}: Target Beast creature gets +1/+1 until end of turn. Morph {1}{G}{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.) 3/3 |
| Invigorate | 2G | Instant | If you control a Forest, rather than pay this spell's mana cost, you may have an opponent gain 3 life. Target creature gets +4/+4 until end of turn. |
| Herald of Anguish | 5BB | Creature — Demon | Improvise (Your artifacts can help cast this spell. Each artifact you tap after you're done activating mana abilities pays for {1}.) Flying At the beginning of your end step, each opponent discards a card. {1}{B}, Sacrifice an artifact: Target creature gets -2/-2 until end of turn. 5/5 |
| Altar of the Goyf | 5 | Tribal Artifact — Lhurgoyf | Whenever a creature you control attacks alone, it gets +X/+X until end of turn, where X is the number of card types among cards in all graveyards. Lhurgoyf creatures you control have trample. |
| Rabble-Rouser | 3R | Creature — Goblin Shaman | Bloodthirst 1 (If an opponent was dealt damage this turn, this creature enters the battlefield with a +1/+1 counter on it.) {R}, {T}: Attacking creatures get +X/+0 until end of turn, where X is Rabble-Rouser's power. 1/1 |
| Vicious Betrayal | 3BB | Sorcery | As an additional cost to cast this spell, sacrifice any number of creatures. Target creature gets +2/+2 until end of turn for each creature sacrificed this way. |
| Blightcaster | 3B | Creature — Human Wizard | Whenever you cast an enchantment spell, you may have target creature get -2/-2 until end of turn. 2/3 |