Lifegain
Climb out of reach, then turn a huge life total into a win.
Gaining life on its own does not win a game, it only buys time. The theme works when the deck also runs cards that trigger every time you gain, or that turn the total itself into damage or cards. Treat the life as fuel for an engine rather than as the plan.
Not this one?
Leave empty for no limit. Cards you own do not count.
Commanders for Lifegain
Ordered by how often they are played, with the ones you own first.