Anara, Wolvid Familiar

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.

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.

Anara's first ability affects commanders you control even if you don't own them. It doesn't affect your commander if another player controls it.

If Anara is your commander, its first ability affects itself during your turn.

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.

If your Commander deck has two commanders, you can only include cards whose own color identities are also found in your commanders' combined color identities. If Falthis and Kediss are your commanders, your deck may contain cards with black and/or red in their color identity, but not cards with green, white, or blue.