The targeted creature’s controller, not Banishing Knack’s controller, is the one who can activate the creature’s new ability.
01-08-2008
wotc
“Summoning sickness” applies. The new ability can’t be activated unless the targeted creature has been under its controller’s control since the beginning of that player’s most recent turn or it has haste.
Random a card of Magic: The Gathering (MTG), but you can also roll the D20 dice, random a Planeswalker, have fun with the random rules and more.