[A weird cloth approaches Undyne and Hakai.]

Allow me to join your ranks!

['Jack' hasn't done a ton of customisation to his cloth, but there's one notable difference about it since the week's gone by! His fake wooden tail has a bunch of nails sticking out of it, turning it into a respectable bludgeoning weapon.

It's also just generally kind of edgy.] I can respect a group with confident fighters such as yourself! I believe you're worthy of my added strength!