Naar Isle is a common Plane — Wildfire card from Planechase Planes (OHOP), collector number 26. Current market price: $5.00, 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.