In this rule

Historical Rules · 18 June 2021

Rule 717.1b

Official source text from the 18 June 2021 Rules release

Permalink

Exile every object on the stack, including the object that’s resolving. All objects not on the battlefield or in the command zone that aren’t represented by cards will cease to exist the next time state-based actions are checked (see rule 704, “State-Based Actions”).

Find this number in the current Rules