To have two commanders, both must have the partner ability as the game begins. Losing the ability during the game doesn't cause either to cease to be your commander.
Anara, Wolvid Familiar
Because damage remains marked on a creature until the damage is removed as the turn ends, nonlethal damage dealt to a commander you control may become lethal if Anara leaves the battlefield during that turn.
Once the game begins, your two commanders are tracked separately. If you cast one, you won't have to pay an additional {2} the first time you cast the other. A player loses the game after having been dealt 21 damage from any one of them, not from both of them combined.
Magic: The Gathering · ™ & © Wizards of the Coast · Illus. Jesper Ejsing
Card data via Scryfall. Rarix is fan-made; not endorsed by the rights holders.
