Budget Alternatives to Omnath, Locus of Mana

Sap Sucker $0.07 Contraption Whenever you crank this Contraption, add {G}. Tundra Fumarole $0.13 1RR · Snow Sorcery Tundra Fumarole deals 4 damage to target creature or planeswalker. The Bloodsky Massacre $0.15 1BR · Saga I — Create a 2/3 red Demon Berserker creature token with menace. Sakura-Tribe Springcaller $0.15 3G · Snake Shaman At the beginning of your upkeep, add {G}. Kessig Naturalist // Lord of the Ulvenwald $0.22 Human Werewolf // Creature — Werewolf Whenever this creature attacks, add {R} or {G}. Brazen Collector $0.26 1R · Raccoon Rogue First strike Fangorn, Tree Shepherd $0.37 4GGG · Treefolk Treefolk you control have vigilance. Sakiko, Mother of Summer $0.40 4GG · Snake Shaman Whenever a creature you control deals combat damage to a player, add that much {G}. Neheb, Dreadhorde Champion $0.56 2RR · Zombie Minotaur Warrior Trample Grand Warlord Radha $0.70 2RG · Elf Warrior Haste Upwelling $1.26 3G · Enchantment Players don't lose unspent mana as steps and phases end. Tanuki Transplanter $1.43 3G · Equipment Dog Whenever this creature or equipped creature attacks, add an amount of {G} equal to its power. The Last Agni Kai $1.96 1R · Instant Target creature you control fights target creature an opponent controls.