Ketria is a common Plane — Ikoria card from March of the Machine Commander (MOC), collector number 55. Current market price: $1.99, TCGplayer market prices via Scryfall.
When you planeswalk to Ketria and at the beginning of your upkeep, put your choice of a vigilance, menace, or trample counter on target creature you control. Whenever chaos ensues, exile cards from the top of your library until you exile a nonland permanent card. Put that card onto the battlefield or into your hand.