Because there is no time limit, you can carefully develop a strategy by considering where elements are going to drop. Set up big chains to do lots of damage. When you match elements, they will sometimes leave behind a glowing spell tiles. The larger the match, the better the chance of this happening. When spell tiles are matched, you will automatically attack with a corresponding spell for damage. If the spell is caught in a cascade, its damage will be amplified. If there are two spell tiles of the same type, they will combine at the end of the cascade for one huge spell.