Goddess Gabija (6)
Grita told you that with the present danger, the plan to directly reach Goddess Gabija via the Transport Magic Circles should be abandoned, and you should focus on the monsters rushing into the tower. Talk to Grita for more details.
Grita said in order to activate the Tower's Barrier Device again, it would need a great amount of energy. Set the gem Grita gave you on the ground and recharge the gem with the monsters' life force.
Agailla Flurry's Barrier (113)