Useless Scythes
Base materials total
Enchanting

Per step (one attempt)

+0 → +1
chance 100 %
+1 → +2
chance 100 %
+2 → +3
chance 70 %
+3 → +4
chance 40 %
+4 → +5
chance 25 %
+5 → +6
chance 18 %
+6 → +7
chance 18 %
+7 → +8
chance 14 %
+8 → +9
chance 12 %

Minimum materials (no failures)

The sum over all steps assuming every attempt succeeds first try. Real spending is higher: the odds get worse the higher you go, and the client data has no downgrade model. The client does not store gold costs.