Smelter

Smelter is an unlockable activated item added in The Binding of Isaac: Afterbirth †.

Effects[]

Upon use, any trinkets that the player is holding are destroyed, and their effects are permanently applied to the player.
Increases the chance for a trinket to drop. (Has a 2% chance to turn the pickup variant into a trinket.)

While held, Mom's Box will double the effect of all absorbed trinkets (if their effects can be doubled).
This item can remove the Tick.
Trinkets whose effects only activate once, such as Store Credit, Missing Poster, and Walnut, will still only activate once after being absorbed.
Perfection and its effect is still removed if Isaac takes damage from regular sources.
Faded Polaroid cannot be used to open the Strange Door while smelted.
It is possible to see previously smelted trinkets during a victory lap, or if the trinket Item Pool is exhausted. Picking up a copy of a trinket will not duplicate that trinket's effect.
The trinket will not be absorbed if Smelter is activated during the trinket pickup animation.
Smelted trinkets appear on the item tracker.

Smelter, alongside Marrow are currently the only items you can unlock from defeating Mom's Heart or It Lives on hard mode.

Trinket Modifiers

Items:

Apollyon Unlocks