Tainted Bethany

Tainted Bethany is a character added in The Binding of Isaac: Repentance. She is the alternate version of. Tainted Bethany is unlocked by reaching and using either the  or the  to access a special room in one of the walls while playing as Bethany.

Tainted Bethany starts with 3 soul hearts, 6 blood charges, and in the consumable slot.

Tainted Bethany is unable to utilize red hearts as health and cannot obtain red heart containers, similar to. When picked up, red hearts instead are converted to a resource unique to Tainted Bethany called "blood charges" at the rate of one charge per half heart. The number of blood charges currently owned is listed along with the pickup counters. Blood charges can be consumed to use Tainted Bethany's activated item when the item isn't fully charged, at the rate of one blood charge per empty bar of charge.

Any items held by Tainted Bethany that give positive modifiers and multipliers have only 75% of their effect. Familiars and Orbitals also deal only 75% of their usual damage. Negative modifiers and multipliers are not reduced.

Item & Strategy Notes

 * Since she is able to generate items herself, skipping Treasure Rooms in favor of Planetariums is generally a more viable strategy for Tainted Bethany than other characters.
 * Since Lemegeton pulls from the current room's item pool, this means Tainted Bethany can get the ghosts of Planetarium items as well. These items tend to be very powerful, so this can be a powerful strategy.
 * Blended hearts will count as red hearts and only contribute towards the red heart charge meter.
 * Items created by Lemegeton don't count towards Transformations.
 * Items that normally grant consumables on pickup will not do so if created by Lemegeton.
 * It is often a good strategy to hoard red hearts until you get an Angel Room or Devil Room, then use them all up inside that room to get as powerful as possible.
 * Secret Rooms and Curse Rooms are also a good alternative if you can't get an Angel or Devil room, as the quality of the average item in that pool is higher than the treasure room pool.

Good Items

 * : Doubles the amount of held blood charges.
 * 2 of Hearts + : Allows for the creation of infinite blood charges as long as you have at least 13.
 * : Spawns 1-16 full red hearts, granting a potentially very significant number of blood charges.
 * Queen of Hearts + Any item that can duplicate it (,, + , or Blank Card): Gives infinite blood charges, with the added benefit of leaving spare hearts on the floor for later use.
 * : Causes Lemegeton to be used twice upon activation, spawning two passive wisps on use.
 * : This item gives blood charges every 15 enemies killed, allowing exploitation of some enemies to farm infinite blood charges.
 * : Grants blood charges upon use with no change to health, allowing for unlimited blood charges.
 * : Eraser can be charged and used with blood charges, allowing multiple uses per floor.
 * : This item gives 1 blood charge per enemy killed, which makes it powerful for early floors. Can farm infinite blood charges with enough patience and Door Stop/.
 * : This item doubles blood charges gained when picking up red hearts.
 * Mega Battery: Both Tainted Bethany's held active item and Lemegeton are charged double.
 * : With her blood charges, Tainted Bethany can explore more red rooms than other characters, allowing her to gain the benefits of red special rooms easily. In turn, this allows her to use Lemegeton to gain items from those item pools in addition to their normal contents.
 * : This item is particularly well-suited for Tainted Bethany. It not only provides a steady source of usable health, it also replaces all of the Boss Items with devil deals. Tainted Bethany can also convert red hearts into charges for extra uses of the Satanic Bible. Additionally, if you activate Lemegeton in a boss room after activating the Satanic Bible on that floor, Lemegeton will pull from the devil deal pool to create a fire. Interestingly, this works even on bosses that don't drop an item you can pay for, such as Mom, Satan, or Blue Baby. This makes the Satanic Bible one of the most powerful activated items for Tainted Bethany.

Interactions

 * : If you have an active item in your active item slot, charges gained by 4.5 Volt will be added to your active item if it has empty charges. If your active item is fully charged, charge will be added to Lemegeton.
 * : Same effect; active item will be charged first.
 * Little Battery: Same effect; active item will be charged first. If more charges than necessary for full charge are added, remaining charges will be lost, and not be added to Lemegeton. If picked up when active item is fully charged, charges will be added to Lemegeton.
 * : Hearts will only collect in The Jar when you have 99 blood charges.
 * Red heart restoration: All items and effects that restore red hearts directly will instead add blood charges.
 * Full heal effects, however, do not give anything.
 * : Will remove all item wisps, but keep the effect of the items.(a bug?) The effects do not stay forever. It is unknown what causes them to disappear, but moving between rooms and floors alone does not seem to remove them. Using Lemegeton again removes the item effects.

Trivia

 * It is possible that the orb embedded in her forehead may be a third eye.
 * When Tainted Bethany dies, the orb embedded in her forehead stops glowing.
 * The achievement for unlocking Tainted Bethany is "The Zealot", a possible title for the character.
 * A zealot is someone with fanatical devotion to their faith or ideals. This is a reference to the fact that she is one of the more "angelic" characters.