Collapsing Borders is a rare Enchantment card from Invasion (INV), collector number 141. Current market price: $0.36 (foil $10.25), TCGplayer market prices via Scryfall.
Domain — At the beginning of each player's upkeep, that player gains 1 life for each basic land type among lands they control. Then this enchantment deals 3 damage to that player.