Chandra, Pyrogenius

In Commander, Chandra, Pyrogenius is a fringe inclusion in planeswalker-tribal or Chandra-specific builds — the emblem is legitimately threatening in a multiplayer game where each opponent takes 5 damage per spell, but six mana competes with game-ending plays and most red decks would rather spend that slot on something with immediate board impact. In competitive 60-card formats like Modern and Pioneer, it simply doesn't see play; six mana is a turn too slow for any red strategy that can win the game outright at that point on the curve. Legacy and Vintage are non-starters for the same reason amplified. Oathbreaker is arguably its best home outside Commander tribal — as a signature spell target or supporting walker, the emblem can close out a two-player game quickly.