Stream of Life

Lifegain in the earliest era was treated as roughly mana-neutral: pay X, gain X, with a single green pip as the tax for access. That equation has not survived contact with thirty years of design. Modern lifegain either ties the life to a body (Lone Missionary, the soul-sisters lineage, a Wurm's Tooth grinding out one point at a time), gates it behind a condition, or buries it on a creature that does three other things. A sorcery that converts mana to life at a one-to-one rate, with no rider and no incidental effect, is what the design team stopped printing once they understood that life totals are a resource you want players to fight over, not buy in bulk. The lineage that followed is visible: Congregate scaled to creatures on the battlefield, Rest for the Weary added a land-drop condition, Tendrils of Corruption married the gain to removal. Each one added a reason to cast it beyond the raw number. This is the unadorned ancestor of that whole branch, a snapshot of where green's relationship with life as a resource started: open-ended, generous, and entirely uninterested in giving the caster anything to do with the life beyond having it.