M:tG card similarity search
3RR · Creature — Insect
At the beginning of your upkeep, sacrifice Lithophage unless you sacrifice a Mountain. 7/7
| Name | Mana | Type | Text | 
|---|---|---|---|
| Mana Vortex | 1UU | Enchantment | When you cast this spell, counter it unless you sacrifice a land. At the beginning of each player's upkeep, that player sacrifices a land. When there are no lands on the battlefield, sacrifice Mana Vortex. | 
| Masticore | 4 | Artifact Creature — Masticore | At the beginning of your upkeep, sacrifice Masticore unless you discard a card. {2}: Masticore deals 1 damage to target creature. {2}: Regenerate Masticore. 4/4 | 
| Molder Slug | 3GG | Creature — Slug Beast | At the beginning of each player's upkeep, that player sacrifices an artifact. 4/6 | 
| Vaporous Djinn | 2UU | Creature — Djinn | Flying At the beginning of your upkeep, Vaporous Djinn phases out unless you pay {U}{U}. (While it's phased out, it's treated as though it doesn't exist. It phases in before you untap during your next untap step.) 3/4 | 
| Demonic Appetite | B | Enchantment — Aura | Enchant creature you control Enchanted creature gets +3/+3. At the beginning of your upkeep, sacrifice a creature. | 
| Breeding Pit | 3B | Enchantment | At the beginning of your upkeep, sacrifice Breeding Pit unless you pay {B}{B}. At the beginning of your end step, create a 0/1 black Thrull creature token. | 
| Emperor Crocodile | 3G | Creature — Crocodile | When you control no other creatures, sacrifice Emperor Crocodile. 5/5 | 
| Pit Spawn | 4BBB | Creature — Demon | First strike At the beginning of your upkeep, sacrifice Pit Spawn unless you pay {B}{B}. Whenever Pit Spawn deals damage to a creature, exile that creature. 6/4 | 
| Fountain of Renewal | 1 | Artifact | At the beginning of your upkeep, you gain 1 life. {3}, Sacrifice Fountain of Renewal: Draw a card. | 
| Clam Session | 1UU | Creature — Clamfolk | As Clam Session enters the battlefield, choose a word. At the beginning of your upkeep, you may sing at least six words of a song, at least one of which is the chosen word. If you don't, sacrifice Clam Session. You can't repeat a song. 2/5 |