Planar dice in Planechase variant works symmetrically

After enabling the Planechase option, each player has the opportunity to roll the planar dice on either player's main phase.
Instead, only the player whose turn it is is supposed to be able to roll the dice.

Start by reproducing the Planechase behavior with the option enabled and trace where planar-dice rolls are permitted during each player's main phase. Done means only the player whose turn it is can roll the planar die during that player's main phase.

Written by the indexing model from the issue text.