I saw a few profiles with Ex Card applied (specially Lilith card from Facebook event) and Stage 4 is not active. Which special quest is needed to beat?

Originally Posted by chillinfar

I saw a few profiles with Ex Card applied (specially Lilith card from Facebook event) and Stage 4 is not active. Which special quest is needed to beat?

If I remember correctly, there is a one-time mission that Ex lvl +5 when you reach lvl 50

LVL 50 offers chestnut.

Originally Posted by chillinfar

LVL 50 offers chestnut.

It doesn't matter. It also gives you the first 5 Ex-Lvls
I should know, I have half my gals with Ex-Lvls already

They aren't really that useful, except for top50 PvP battles, where having an extra 1 SED in the Top5 cards in game means defeating everybody.
Every Ex Lvl raises the gals SED by 3pts, no matter the rarity.