Spacecraft Plane
Planar cards are used when playing Planechase, a modifier that can be used for any match of any format.
When playing planechase, there's typically a single planar deck shared by all players. At the beginning of the game, the top card of the planar deck is revealed until a plane is revealed (there are also cards that go in the planar deck which are not planes). The static ability of that plane is now active.
At any time a player could cast a sorcery on their turn, they may pay any necessary costs and roll the planar die. The first time a player rolls the planar die in a turn, it's free. After that, the cost increases by {1} each roll. If the player gets the planeswalk symbol, the next card in the planar deck is revealed, and all players "planeswalk" to that region of that plane. If the player rolls chaos, then that player does the chaos effect on the plane.
Planeswalking to another plane does not use the stack, and cannot be responded to. By the time the new plane is revealed, players cannot respond to the plane changing.
In contrast, rolling chaos puts the ability on the stack so it may be responded to.
All Planes
AlaraAlfava Metraxis
Amonkhet
Amsterdam
Androzani Minor
Antausia
Apalapucia
Arcavios
Arkhos
Azgol
Belenon
Blind Eternities
Bolas's Meditation Realm
Capenna
Chicago
Cridhe
Darillium
Dominaria
Earth
Echoir
Eldraine
Equilor
Ergamon
Fabacin
Fiora
Foldaria
Gallifrey
Gargantikar
Gobakhan
Horsehead Nebula
Ikoria
Innistrad
Iquatana
Ir
Ixalan
Kaladesh
Kaldheim
Kamigawa
Kandoka
Karsus
Kephalai
Kinshala
Kolbahan
Kylem
Kyneth
Lorwyn
Luvion
MagicCon
Mars
Mercadia
Mirrodin
Moag
Mongseng
Moon
Muraganda
Necros
New Earth
New Phyrexia
Outside Mutter's Spiral
Phyrexia
Pyrulea
Rabiah
Rath
Ravnica
Regatha
Segovia
Serra’s Realm
Shadowmoor
Shandalar
Shenmeng
Skaro
Spacecraft
Tarkir
The Abyss
The Dalek Asylum
The Library
Theros
Time
Trenzalore
Ulgrotha
Unknown Planet
Valla
Vryn
Wildfire
Xerex
Zendikar
Zhalfir