Mystic Vale

From BoardGameGeek:

A curse has been placed on the Valley of Life. Hearing the spirits of nature cry out for aid, clans of druids have arrived, determined to use their blessings to heal the land and rescue the spirits. It will require courage and also caution, as the curse can overwhelm the careless who wield too much power. In Mystic Vale, 2 to 4 players take on the role of druidic clans trying to cleanse the curse upon the land. Each turn, you play cards into your field to gain powerful advancements and useful vale cards. Use your power wisely, or decay will end your turn prematurely. Score the most victory points to win the game! Mystic Vale uses the innovative "Card Crafting System", which lets you not only build your deck, but build the individual cards in your deck, customizing each card's abilities to exactly the strategy you want to follow.