Walpurgis

I did the Crimson story arc and had to defeat the Kronos(?(Giant Malta robot)) twice, once as an ambush and once in an outdoor mission... I completed the story arc but never recieved any souvenir for it.

Is there a way to see if you have beat certain missions which have the Monster type mob in it and reward that badge? I defeated Adamaster in a portal mission once and defeated the Kronos robot twice... big pain in the rear to find people who are doing that certain story arc...