Snowfall⁣ - Ice Age⁣ (Common)

Snowfall is an enchantment that enhances your mana production from Islands, allowing you to add extra blue mana, especially if the Island is a snow land. This can help offset the cumulative upkeep cost, making it easier to keep Snowfall on the battlefield. It's most effective in decks that utilise snow lands and rely on blue mana for control strategies, but the upkeep can become a burden if not managed properly.