Locking Glass
Locking Glass
SP Cost 8
Soulbound Yes (Riltia)
First Seen 0.2.4
Locking Glass is one of Riltia's skills. Presumably, it came about through a tier-up. It increases the target's damage reduction by 2. Alternatively, it can be cast for 5 SP instead, at the cost of preventing any movement during the duration.

Interestingly, this skill has been with us long enough to reference MP, not SP.