Duet Night Abyss: no 5★ Demon Wedge drops — you forge it
None of the 124 5★ Demon Wedges is on any drop list, and 111 of them have a blueprint. The usual recipe is 5 copies of the same Wedge at 4★ — so the real farm is one star down.
Not one of Duet Night Abyss's 124 5★ Demon Wedges drops from a stage or an enemy. 111 of them are forged from a blueprint instead, and the most common recipe asks for nothing but 5 copies of the same Wedge at 4★. For most 5★ Wedges, farming one really means farming its 4★ version.
Which Wedges drop and which are forged
Count each Wedge once per star level, since that is how the drop lists and blueprints treat them ("Nirvana 4★" and "Nirvana 5★" are separate items). The split is almost perfectly clean:
| Rarity | Wedges | Drop somewhere | Forged | Neither |
|---|---|---|---|---|
| 1★ | 13 | 13 | 0 | 0 |
| 2★ | 8 | 8 | 0 | 0 |
| 3★ | 62 | 51 | 0 | 11 |
| 4★ | 144 | 121 | 0 | 23 |
| 5★ | 124 | 0 | 111 | 13 |
Below 5★ nothing is forged: 193 of the 227 Wedges from 1★ to 4★ drop somewhere, and every 1★ and 2★ one does. At 5★ the rule flips completely. Nothing drops, and the forge is the only route for all but 13 of them. Those few, like the lower-star Wedges in the "Neither" column, have no drop and no blueprint listed, so they are not something you can plan a farm around.
A 5★ Wedge is never a lucky drop. It is a planned purchase, paid for in 4★ copies.
What a 5★ blueprint asks for
77 of the 111 forgeable 5★ Wedges have a blueprint made only of 4★ copies of themselves. For 68 of those the count is 5. The rest mix in other Wedges, lower-star copies in bulk, or extra materials.
The coin and time side is predictable. For 99 of the forgeable 5★ Wedges the cheapest blueprint costs 50,000 coin, and the usual forge time is 30 minutes. The most expensive blueprints reach 200,000 coin and 120 minutes. Coin is rarely the limit. The copies are.
So farm the 4★ version
This is the practical upshot. Of the 77 5★ Wedges forged from their own copies, 67 have their 4★ version on the where-to-farm list. For those, the route is simple: farm the 4★ until you hold enough copies, then forge. Every spare 4★ copy of a Wedge you want at 5★ is part of the price, so hold on to them.
Every 4★ drop sits in one of 3 modes. Counting each 4★ Wedge once per mode that drops it:
| Mode | 4★ Wedges it drops |
|---|---|
| Expulsion | 90 |
| Defence | 77 |
| Termination | 24 |
Many Wedges drop in more than one mode, so the rows overlap. The exact stages and level bands for each one are on its where-to-farm entry.
Using the pages
Start from the Wedge you want on the Mods page. If it is 5★, look it up on the blueprints page to see exactly which copies and materials the forge wants. Then take the 4★ name to the where-to-farm page. Across all five star levels that covers 351 Wedges, and for nearly every 5★ one the path runs through the forge.