KMS 1.2.175 - Hyper Skills

I believe it was always 5 stacks, the 20 was a typo in the level readout where the variable for max stacks should have been placed. Test videos showed it never passed 5 stacks or something like that.

In reality, it was buffed a good amount.
+4% damage -> +5% damage
+8% critical rate -> +10% critical rate
10,000 damage cap bypass -> 20,000 damage cap bypass
30 second duration -> 120 second duration

Ah, you don't say? Thank you for that piece of information, my good sir.