Fiend's Horn is an unlockable passive item in Fiend Folio, a mod for The Binding of Isaac.
Grants a chance to spawn a Hollow Friend each time an enemy dies. The friends disappear on room clear and do not produce any hearts.
The chance to spawn a Hollow Friend scales with luck and the amount of immoral hearts Isaac has, using the formula: 0.2 + 0.15 × max(14, LuckStat) + 0.025 × ImmoralHearts.
Defeat Delirium as Fiend.
Fiend's Horn can be found in the following item pools:
| Name | Weight |
|---|---|
| Treasure Room |
1.0/1.0
|
| Greed Treasure Room |
1.0/1.0
|
| Devil Room |
1.0/1.0
|
| Greed Devil Room |
1.0/1.0
|
| Demon Beggar |
1.0/1.0
|
| Dire Chest |
1.0/1.0
|
The following tags are applied to this item:
| Id | Description |
|---|---|
| summonable | Can be summoned via Lemegeton. |
| offensive | Can appear for Tainted Lost. |
The following special synergies and interactions for Fiend's Horn have been documented.
| Mod | Item | Synergy |
|---|---|---|
| --- | Abyss | Spawns a pink locust. |
* Note that not all possible synergies and interactions are listed here.