Tunnel Ignus is a rare Creature — Elemental card from Scars of Mirrodin (SOM), collector number 105. Current market price: $0.53 (foil $4.80), TCGplayer market prices via Scryfall.
Whenever a land enters under an opponent's control, if that player had another land enter the battlefield under their control this turn, this creature deals 3 damage to that player.