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 |
|---|---|---|---|
| Hezrou | 5BB | Creature — Frog Demon | Whenever one or more creatures you control become blocked, each blocking creature gets -1/-1 until end of turn. 6/6 |
| Quag Sickness | 2B | Enchantment — Aura | Enchant creature Enchanted creature gets -1/-1 for each Swamp you control. |
| Manabarbs | 3R | Enchantment | Whenever a player taps a land for mana, Manabarbs deals 1 damage to that player. |
| Robe of Stars | 1W | Artifact — Equipment | Equipped creature gets +0/+3. Astral Projection — {1}{W}: Equipped creature phases out. (Treat it and anything attached to it as though they don't exist until its controller's next turn.) Equip {1} |
| Soul Tithe | 1W | Enchantment — Aura | Enchant nonland permanent At the beginning of the upkeep of enchanted permanent's controller, that player sacrifices it unless they pay {X}, where X is its mana value. |
| Honden of Infinite Rage | 2R | Legendary Enchantment — Shrine | At the beginning of your upkeep, Honden of Infinite Rage deals damage to any target equal to the number of Shrines you control. |
| World-Weary | 3BB | Enchantment — Aura | Enchant creature Enchanted creature gets -4/-4. Basic landcycling {1}{B} ({1}{B}, Discard this card: Search your library for a basic land card, reveal it, put it into your hand, then shuffle.) |
| Jadecraft Artisan | 3G | Creature — Merfolk Shaman | When Jadecraft Artisan enters the battlefield, target creature gets +2/+2 until end of turn. 3/3 |
| Success! | W | Instant | Target creature gets +2/+2 until end of turn. If it's a host or has augment, it gains lifelink until end of turn. |
| Deepglow Skate | 4U | Creature — Fish | When Deepglow Skate enters the battlefield, double the number of each kind of counter on any number of target permanents. 3/3 |