(A Chamber entering the battlefield becomes the current Chamber.)

When Arcane Crossway enters the battlefield, draw a card.

At the beginning of each player's end step, if Arcane Crossway is the current Chamber, that player may discard a card. If they do, they draw a card.

Traverse {1} (Any player may pay the traverse cost of two Chambers to move from one to the other. Traverse as a sorcery.)