Planes Deck
Overview
The Planes Deck introduces massive battlefield-wide effects, like alternate realities. These change the rules for all players until a new Plane is revealed.
Setup
Shuffle the Planes Deck. Reveal one card at game start. It remains active until replaced by another plane via a recipe trigger or dice roll.
Rotation
Planes can rotate every 1-3 turns (agree in advance), on a planar die roll, or via specific spell effects. You can use a d6 to randomly roll a plane change at end step.
Card Behavior
Plane effects are persistent global changes - like all creatures having +1/+1 or spells being recastable from the graveyard. Only one Plane is active at a time.
Optional Rules
Add 'Planar Dice' or 'Planechase Tracker' to determine when planes shift. You may also allow Planes to stack or phase between active/inactive.