Clear Rune

Item Icon
Pickup Quote	"Rune mimic"
Entity ID	5.100.263
Recharge Time	Variable
Item Pool	Crane Game Secret Room
Quality	2
Item Tags
Collection Grid	(page 3, column 19, row 1)
Unlock Method	Complete Onan's Streak (challenge #29) Complete The Guardian (challenge #30)

Clear Rune is an activated item added in The Binding of Isaac: Repentance.

Effects

• Copies the effects of Isaac's held rune or soul stone, similar to the Blank Card and Placebo.
• Drops one random rune the first time it's picked up.

Recharge time

This is a list of the following recharge times the item can have, depending on the consumable it mimicked last:

• 1 room:
  • Rune Shard
  • Soul of Lazarus
• 2 rooms:
  • Rune of Ansuz
  • Rune of Berkano
  • Rune of Hagalaz
  • Soul of Cain
• 3 rooms:
  • Rune of Algiz
  • Blank Rune
  • Soul of ???
  • Soul of Judas
  • Soul of the Lost
  • Soul of Magdalene
• 4 rooms:
  • Black Rune
  • Rune of Ehwaz
  • Rune of Perthro
  • Soul of Eden
  • Soul of Eve
  • Soul of the Forgotten
  • Soul of Isaac
  • Soul of Jacob and Esau
• 6 rooms:
  • Rune of Dagaz
  • Soul of Apollyon
  • Soul of Azazel
  • Soul of Bethany
  • Soul of Samson
• 12 rooms:
  • Rune of Jera
  • Soul of the Keeper
  • Soul of Lilith

Synergies

• Butter!: Because Clear Rune is dropped upon usage, the recharge time for them is reset to 4, allowing to use more expensive runes much more frequently.
• Car Battery: Essentially uses the rune or soul stone twice.
• Rune of Jera: Allows Isaac to copy pickups with every use. This combination can double Lil' Batteries, which can both circumvent the rune's high charge time and allow for game-breaking combos with repeated use of the synergy.

Interactions

• Book of Virtues: Spawns purple-glowing rune wisps on the middle ring. The wisps spawn Runes/Soul Stones when destroyed, and enemies killed by the wisps' tears have a 15% chance to drop a Rune/Soul Stone. The effect of the wisps and the types of runes they spawn are independent from Clear Rune's charge time and the most recently used rune.

• Tarot Cloth: No effect.
• Void: If Void absorbs both Clear Rune and a consumable-producing item like Mom's Bottle of Pills the latter takes effect first, shifting any rune you are holding out of the primary consumable slot and rendering the Clear Rune effect useless.

Trivia

• Despite being introduced in the Repentance DLC, Clear Rune's place in the Collection Menu is on Page 3, along with other Rebirth items. This is due to the item taking up a previously unused item id.

The Binding of Isaac: Rebirth
Achievements	Attributes	Bosses	Cards and Runes	Challenges	Chapters
Characters	Co-op	Items	Item pools	Monsters	Objects
Pickups	Pills	Rooms	Seeds	Transformations	Trinkets