Elemental: the card game

In this fantasy cardgame, players take role of ancient elemental mages. Creating powerful Talismans, acquiring different spells and gathering elements to cast them, players try to finish their rivals power down to zero.
Each turn players refresh their hands of elements up to seven cards, then they can either announce a power clash and enter a auction for an open spell, or they can have a random talisman card from the talisman deck. When players have spells on their spellbooks (gathered from auctions) they can cast them as many times as they like, as long as they have enough elements to cast them.
Players lose power (starting with 50) in power clashes, in talisman creation and with damages they suffer from opponent spells. First player to reach zero life loses game.