Forbidden Materia

[Gramul]

No, but an 18.95% chance on adding a second tier four on a tier four slotted item is ridiculous. With that math, it should tell you 0% when you try to add five tier 4! How is it possible to succeed on a zero percent chance? K

But it isn't a zero percent chance. It's just very very low. It falls at an exponential rate.
A higher risk will yield a higher reward and a weapon with +140 Strength will be one of unequal value.