Uncharted Haven⁣ - Kamigawa: Neon Dynasty⁣ (Common)⁣ [281]

Uncharted Haven is a land that comes into play tapped, meaning you won't be able to use it for mana the turn you play it. When it enters, you choose a colour, and it can then tap for one mana of that chosen colour. This makes it a flexible option for multicoloured decks, allowing you to shore up your mana base by ensuring you have access to the specific colour you need, but the downside is that you lose out on immediate mana production since it enters the battlefield tapped.