Deathtouch Wintermoor Commander's toughness is equal to the number of Knights you control. Whenever Wintermoor Commander attacks, another target Knight you control gains indestructible until end of turn.
2019-10-04
As long as Wintermoor Commander is on the battlefield, its ability will count itself, so it'll be at least 2/1.
2019-10-04
Because damage remains marked on a creature until the damage is removed as the turn ends, nonlethal damage dealt to Wintermoor Commander may become lethal if Knights you control leave the battlefield during that turn.
2019-10-04
The ability that defines Wintermoor Commander's toughness works in all zones, not just the battlefield.