In Trails of Cold Steel IV, there is a trophy called Raiders of the Lost Arts. In order to unlock this trophy, you will need to gather all 5 lost arts quartz. Below are where the lost arts quartz can be found! All enemies can be fought up until you start the final operation on 9/1.
- Frozen Epoch – Defeat Fornelius in Eerie Woods (after Sol Shrine on 8/19)
- Leanan’s Kiss – Defeat Magic Knight Regulus-Zamiel on Byronia Island (after Sol Shrine on 8/19)
- Prominence Nova – Defeat Agaragion at Ogiliath Basin on 8/22
- Grail Thelas – Defeat Jilvaglyph on Auros Coastal Road 1 on 8/27
- Aeonian Emperor – Defeat Loa Phantasma on Stargazer’s Tower – Rooftop on 9/1