Historical Rules · 23 July 2021
Rule 311.7
Official source text from the 23 July 2021 Rules release
If a phenomenon card is face up in the command zone, and it isn’t the source of a triggered ability that has triggered but not yet left the stack, the planar controller planeswalks the next time a player would receive priority. (This is a state-based action; see rule 704. See also rule 701.24, “Planeswalk.”)