Spatial Merging

Most Phenomena interrupt the plane you are on and send you somewhere else; this one changes the fundamental rule of how many planes you are on. Ordinary planar travel is singular: you occupy one plane, its chaos ability and static effects define the board, and planeswalking swaps that context wholesale. Spatial Merging breaks the exclusivity by depositing you on two plane cards at once, stacking their static effects, their triggered abilities, and their roll-triggered chaos ability into a single overlapping reality. The design leans on the fact that the Planechase engine was never written to expect two active planes simultaneously, so the interactions it produces are genuinely emergent rather than scripted: two "at the beginning of each player's upkeep" clauses fire together, two chaos abilities resolve off one roll, and the table has to adjudicate what a doubled cosmos actually does. It is a rules-stress design in the shape of a variant-format novelty, a card whose entire payload is the momentary confusion and combinatorics of two worlds sharing one space. The reveal-until-two mechanism is the only cost: your planar deck decides which pair of realities collide, so the merge is never something you engineer, only something you survive.