When Protocol Knight enters the battlefield, tap target creature an opponent controls. Put a stun counter on that creature if you control another Knight.
"Ingress without proper writ of extraplanar intent? Unacceptable!"
2023-04-14
Protocol Knight's ability can target a creature that's already tapped.
2023-04-14
Whether or not you control another Knight is checked only as Protocol Knight's ability is resolving. It doesn't matter if you still control Protocol Knight at that time, or if it's still a Knight.