Glass Elemental

Glass elementals often appear in pairs with a crystallized field of shards around them. There are also 1 or 2 big pink crystals which contain a memento. The best way to kill them easily is to break as much as you can crystal shards to have larger place to dodge their projectiles. Then, study their pattern (1 X-attack, 1 +-attack, 1 attack which targets you). Crystals appear in Forest, Cave and Grotto.