Historical Rules · 7 June 2024
Rule 702.75a
Official source text from the 7 June 2024 Rules release
Hideaway is a triggered ability. “Hideaway N” means “When this permanent enters the battlefield, look at the top N cards of your library. Exile one of them face down and put the rest on the bottom of your library in a random order. The exiled card gains ‘The player who controls the permanent that exiled this card may look at this card in the exile zone.’”