Lethal Scheme isnt the most efficient kill spell, but it does hit planewalkers (big plus for Commander)
When deciding which green ramp cards to play in your decks, you should consider two factors: cost and synergy
Sorcery : Simply put, a sorcery is a spell you cast directly from your hand with a one-time effect that is then discarded
Otherwise, itll fit nicely into Mutate piles
Cards in the list include Tegwyll, Duke of Splendor, Alela, Cunning Conqueror, Arcane Denial, Arcane Signet, Archmage of Echoes, Bitterblossom, Blightwing Bandit, Bojuka Bog, Brazen Borrower // Petty Theft, Castle Locthwain, Choked Estuary, Cloud of Faeries, Command Tower, Consider, Darkwater Catacombs, Dig Through Time, Dimir Aqueduct, Dimir Signet, Distant Melody, Drowned Catacomb