Red level up currency

[Rin]

How do i get those red level up currency? the things you need once you have leveled all main stats to +5 and then need to get higher? i have 10 (no idea how i got those) and i need 10 for each +1 stat upgrade now. where do i get those?

[Neko]

[This page is well worth a look]
https://letitdie.gamepedia.com/Bloodnium
You would have gotten 10 from picking up a rare Splattershroom, that rarely spawns in the tower.
The main way to get Bloodnium would be from killing Haters on 50+ Floors, or occasionally Quests can reward you with Splattershrooms, although they are often very difficult.

By using Bloodnium on your character, at the Mingo, it's initial cost is low, but increases required cost as you go up.
[Check this page out]
https://letitdie.gamepedia.com/Fighters

Even though you can use Bloodnium on lower Grade characters, it is highly recommended to save them for Grade 6 Fighters.

Good quality gear is just as important as which Grade fighter you are using.