Tsavo\
06-11-2014

Acquisition Requirements

Swordplay rank 10
Swordmastery rank 8

Sword quick finesse 25

Wild Slash

Alrn
11-22-2021

Somehow can be obtained from Assault Base Soldier Lv 50 on Island of Sumatra Southwest Coast.. even though he never actually used it.

Guilder
11-22-2021

Virtually every tech I ever learned was never used on me prior to acquisition, so that isn't strange at all.