New Horizons is a common Enchantment — Aura card from War of the Spark (WAR), collector number 168. Current market price: $0.14 (foil $0.34), TCGplayer market prices via Scryfall.
Enchant land When this Aura enters, put a +1/+1 counter on target creature you control. Enchanted land has "{T}: Add two mana of any one color."