Holy shit, the SSR Eidolon just dropped from of those fancy rainbow chests on Expert.

Welp, I guess the exchange prices are fair enough after all. If you grind long enough you don't have to buy all four.

[Advent Event] Eidolon from another world - Advent battle vs. Apocalypse-screen-shot-2017-02-25-6.37.57-pm.jpg