Tectonic Split is a rare Enchantment card from Avatar: The Last Airbender Eternal (TLE), collector number 144. Current market price: $2.40 (foil $2.36), TCGplayer market prices via Scryfall.
As an additional cost to cast this spell, sacrifice half the lands you control, rounded up. Hexproof Lands you control have "{T}: Add three mana of any one color."