M:tG card similarity search
2B · Enchantment
At the beginning of your upkeep, sacrifice Contamination unless you sacrifice a creature. If a land is tapped for mana, it produces {B} instead of any other type and amount.
| Name | Mana | Type | Text |
|---|---|---|---|
| Mirror Universe | 6 | Artifact | {T}, Sacrifice Mirror Universe: Exchange life totals with target opponent. Activate only during your upkeep. |
| City of Traitors | Land | When you play another land, sacrifice City of Traitors. {T}: Add {C}{C}. | |
| Kuro, Pitlord | 6BBB | Legendary Creature — Demon Spirit | At the beginning of your upkeep, sacrifice Kuro, Pitlord unless you pay {B}{B}{B}{B}. Pay 1 life: Target creature gets -1/-1 until end of turn. 9/9 |
| Curse of Chains | 1W/U | Enchantment — Aura | Enchant creature At the beginning of each upkeep, tap enchanted creature. |
| Cloistered Youth | 1W | Creature — Human | At the beginning of your upkeep, you may transform Cloistered Youth. 1/1 |
| Hecatomb | 1BB | Enchantment | When Hecatomb enters the battlefield, sacrifice Hecatomb unless you sacrifice four creatures. Tap an untapped Swamp you control: Hecatomb deals 1 damage to any target. |
| Elsewhere Flask | 2 | Artifact | When Elsewhere Flask enters the battlefield, draw a card. Sacrifice Elsewhere Flask: Choose a basic land type. Each land you control becomes that type until end of turn. |
| Xathrid Demon | 3BBB | Creature — Demon | Flying, trample At the beginning of your upkeep, sacrifice a creature other than Xathrid Demon, then each opponent loses life equal to the sacrificed creature's power. If you can't sacrifice a creature, tap Xathrid Demon and you lose 7 life. 7/7 |
| Erosion | UUU | Enchantment — Aura | Enchant land At the beginning of the upkeep of enchanted land's controller, destroy that land unless that player pays {1} or 1 life. |
| Deep Spawn | 5UUU | Creature — Homarid | Trample At the beginning of your upkeep, sacrifice Deep Spawn unless you mill two cards. {U}: Deep Spawn gains shroud until end of turn and doesn't untap during your next untap step. Tap Deep Spawn. (A creature with shroud can't be the target of spells or abilities.) 6/6 |