Sorry Casval, haven't test it out yet. And my friend with a devi card slotted in it just sold hers, so I can't borrow that to test it out.
Anti-Knockback - Working
Uninterruptible Cast - Not Available*
Nullified penalty from DR Card - Didn't test it out.
*I know in rateblablabla site, there's that script for +7 Pantie for uninterupted cast. But nowhere in the description writes that. So I'm unsure if its missing, left out or what.
Spoiler
Official jRO site even stated that, not just rateblabla site. Besides the overseas package 2 came with slotted pantie inside
What a waste If Camp decided to discard +7 pantie uninterruptible cast effect when comboed with Etran's Undershirt