[Third hint added] [Last ~1hrs] [4 GAs with 0 entries] It's been a while...

...since I have published my last thread (that was also my last megapuzzle), and I miss this forum a lot (tonight zpacecat even paid me a visit in a dream). In the last months I haven't even managed to lurk a little here and there in search of some hidden GAs to leech in the discussion section! 0_0
So, I've decided to spend a little time to pass by and say hi to my favourite community..."Hi guys!" <3
But I know what you're looking for...I know what you've been expecting since you've begun reading the first line of this thread...and here it is:
ϛƖㄥϛᄅᄅƖƖƖ (↓↓↑↑↑)

Hint #1: a=1, b=2, c=3 and so on...
Hint #2: things might be a little...overturned
Hint #3: are you sure there is only one puzzle?