The controller of a face-up phenomenon card is the player designated as the planar controller. Normally, the planar controller is whoever the active player is. However, if the current planar controller would leave the game, instead the next player in turn order that wouldn’t leave the game becomes the planar controller, then the old planar controller leaves the game. The new planar controller retains that designation until they leave the game or a different player becomes the active player, whichever comes first.
July 23, 2021 · Adventures in the Forgotten Realms
A vanguard card may have any number of static, triggered, and/or activated abilities. As long as a vanguard card is in the command zone, its static abilities affect the game, its triggered abilities may trigger, and its activated abilities may be activated.
July 1, 2012 · Magic 2013
A scheme card may have any number of static, triggered, and/or activated abilities. As long as a scheme card is face up in the command zone, its static abilities affect the game, its triggered abilities may trigger, and its activated abilities may be activated.