When a event card says "a character is knelt by an opponent's effect", does it refer to the opponent of the target's controller or an opponent of the player who played the event card?
Specifically, can I use Cannot be Bribed, Cannot be Bought on my opponent's character after I use an effect to kneel it?
Cannot be Bribed, Cannot be Bought
[Neutral Event]
Response: After a character is knelt by an opponent's card effect, stand that character. Then, that character claims 1 power and you draw a card.