Historical Rules · 14 April 2023
Rule 901.3a
Official source text from the 14 April 2023 Rules release
A planar die is a six-sided die. One face has the Planeswalker symbol. One face has the chaos symbol. The other faces are blank. 901.4.All plane and phenomenon cards remain in the command zone throughout the game, both while they’re part of a planar deck and while they’re face up.