Hidden Hideout is a rare Land card from Teenage Mutant Ninja Turtles Eternal (TMC), collector number 43. Current market price: $2.09 (foil $35.77), TCGplayer market prices via Scryfall.
This land enters tapped. {T}: Add one mana of any color in your commander's color identity. {2}, {T}: Target creature you control with a counter on it gains lifelink until end of turn.