Xu Lin had completely lost her ability to attack. A Mage with hardly any physical strength—you certainly couldn't expect her to start bashing people with her staff. Judging by the Sealer's leather armor, she didn't seem to be a high-attack class anyway.
Just as I was thinking this, Murmuring Song actually took out a bow from her inventory and equipped it, then started shooting at the defenceless Mage MM right in front of her. Her attack power wasn't particularly high, but against a low-defense, low-health Mage like Xu Lin, it was more than enough.
The 15 seconds were up, and the Seal effect vanished!
Chapter 94