Seasons Past

Seasons Past is legal in Commander, Legacy, Modern, Pioneer, Vintage, and Oathbreaker, but it belongs in Commander above all others — the singleton rule means you never draw it twice, and the self-shuffle clause converts that weakness into a feature, giving you a recursive value engine rather than a dead topdeck. In Legacy and Vintage, six mana is a steep ask in formats where the game often ends by turn three or four, and the effect is powerful but too slow to compete with the raw efficiency of the format staples. Modern and Pioneer are theoretically viable homes, but the same speed problem applies — Seasons Past wants a controlling, grindy game that those formats rarely deliver.