Converter

Converter is an activated item.

Effects

 * Converts two soul hearts or black hearts into a heart container.

Synergies

 * Car Battery - Gives two heart containers for two Soul / Black Hearts.
 * Dark Bum - Receiving Soul Hearts from Dark Bum makes it possible to create new Heart Containers simply by finding Red Hearts.
 * Guppy's Paw - Swapping back and forth can earn a maximum of 10 Heart Containers with this combination.
 * Mitre - Gives an increased chance of finding Soul Hearts instead of Red Hearts, making it easier to find more hearts to convert.
 * Broken Remote - Allows unlimited teleporting.

Seeds
1TNY 7MJ0 (1st floor Shop, Purchase after getting A Quarter in 1st floor Treasure Room) (normal mode only)  Notes: Must be Isaac because a bomb is needed to get a key. The Pandora's Box in the Curse Room must be picked up before entering the shop. Converter is inaccessible on the hard mode seed due to difficulty of getting a key to open the shop. LGD3 W0PB (1st floor Shop, Purchase after getting Store Credit as a drop) (hard mode only)  Notes: Converter is inaccessible on the normal mode seed due to difficulty of getting a key to open the shop.

Converter