Stairs to Infinity is a common Plane — Xerex card from Planechase Anthology Planes (OPCA), collector number 73. Current market price: $8.45, TCGplayer market prices via Scryfall.
Players have no maximum hand size. Whenever you roll the planar die, draw a card. Whenever chaos ensues, reveal the top card of your planar deck. You may put it on the bottom of your planar deck.