Naar Isle is a common Plane — Wildfire card from Planechase Anthology Planes (OPCA), collector number 54. Current market price: $3.77, TCGplayer market prices via Scryfall.
At the beginning of your upkeep, put a flame counter on Naar Isle, then Naar Isle deals damage to you equal to the number of flame counters on it. Whenever chaos ensues, Naar Isle deals 3 damage to target player or planeswalker.