I am aware of the triumph, but even after that one is obtained (and applied) can momentos actually still drop?? The TWAB said - [quote]Just like usual, this Memento is a random drop that will come in the form of an Eerie Engram. It won’t begin immediately, but we’re sure you’ll Triumph over any challenges that may be between you and looking snazzy as heck... or, at the very least, snazzy as your loadout. [/quote] I've yet to hear from any reliable source that anyone has actually obtained one as a drop.