3
All commanders (3)
  1. Ria Ivor, Bane of Bladehold relevance 1.49 · 1.1% (9 of 855 decks)
  2. "Brims" Barone, Midway Mobster relevance 0.78 · 1.5% (2 of 136 decks)
  3. Syr Cadian, Knight Owl relevance 0.58 · 2.9% (1 of 35 decks)

EDH data for Arm the Cathars: adoption stats, associated cards, and its most popular commanders, from 83 real decks.