Stratus Walk

In Commander, Stratus Walk earns its slot only in enchantress or Voltron decks that need evasion on a budget — the cantrip makes it nearly free to run, but it's a win-more card if you're not already set up to profit from combat damage. In Pauper it sees fringe play in tempo and Aura-based strategies where every cantrip matters and making a creature unblockable closes games quickly. Legacy, Modern, and Pioneer are too hostile for a one-mana Aura that doesn't affect the board state immediately, and any deck that wants this effect in those formats has faster, harder-to-interact-with options. Oathbreaker mirrors the Commander read — only include it if your signature spell or planeswalker directly benefits from an unblocked creature.