The planar die
The Planechase series consists of 3 products:
Planechase format
The Planechase format is a casual game variant, which simulates traveling between different planes using the new plane cards. The set comes with a six-sided planar die, that features the planeswalker symbol 
on one face, the chaos symbol 
on another and four blank faces.
Each player enters the game with a regular deck and a planar deck, which features ten or more Plane or Phenomenon cards. The first player to start puts the first card in his planar deck face-up in the command zone. A plane card usually has two abilities. The first one applies as long as the card is revealed, the second one is the chaos ability.
During each player's turn, that player may roll the planar die whenever he or she could cast a sorcery. While the first roll each turn is free, all subsequent rolls in that turn cost 
more than the last. If the is rolled, the owner of the current face-up plane card puts it on the bottom of his planar deck and the current player reveals the top card of his or her planar deck. If is rolled the chaos ability of the plane card triggers. With blank faces, nothing happens.