Historical Rules · 20 January 2017
Rule 604.6
Official source text from the 20 January 2017 Rules release
Some static abilities apply while a card is in any zone that you could cast or play it from (usually your hand). These are limited to those that read, “You may [cast/play] [this card] . . . ,” “You can’t [cast/play] [this card] . . . ,” and “[Cast/Play] [this card] only . . . .”