Temple Spirit

Temple Spirit is a customized monster that is found in all levels of the Forgotten Temple.

When many of them are grouped together, they can all go against you and strip your equipment.

To counter them, you will need 100 MDEF, and 100% Neutral and Fire resistances.

You can try to refine your equipment to get your DEF as close to 99 as you can.

If you're a physical class, you can use Autocast Cards that will automatically cast skills when you use physical attacks. These cards can also work on Temple Seal:

Autocast Cards
The following table is taken from iRO Wiki.