Feed the Clanprotection$0.21Another green life-gain spell that can swing a race hard, especially in creature-heavy decks. It is often stronger than Nourish when it reliably gains 10 life.
Revitalizeprotection$0.22Simple life-gain instant that performs a similar stabilizing function, though it is in white rather than green. It replaces Nourish's larger life burst with a cantrip-like style of life gain.
Haze of Pollenprotection$0.14A green instant that can buy time defensively and gain life if cycled, making it a similar combat-stalling tool. It is more flexible than Nourish but less direct.
Pulse of Murasautility$0.22A green life-gain spell that also recovers a creature or land from the graveyard, giving more value than raw life gain. It serves a similar stabilization role with added recursion.
Vital Surgeprotection$0.06Very close in function: a green instant that gains 4 life and can be copied to gain more in multiplayer or with spell synergy. It is a budget-style life-buffer at a similar slot.
Golgari Charmutility$0.77Not a pure life-gain spell, but one mode can regenerate your team and it provides flexible defensive value at instant speed. It can fill a similar survival role when you want utility over raw life.
Arachnogenesisprotection$5.47A green instant that can completely blunt an attack and buy a large amount of effective life by creating blockers. It serves the same defensive stabilization role as Nourish.
Life Goes Onprotection$0.06Direct life gain in green that can be much larger than Nourish in creature-rich games. It is one of the cleanest functional alternatives if you just want a cheap life burst.