Habit

Effects

• When Isaac is hit, his active item gains 1 room's worth of charge.

Synergies

• 9 Volt + Yum Heart: Isaac could potentially become invincible on early floors or with The Wafer, losing only half a heart per three hits taken.
• The Battery + (Added in Repentance) Sharp Plug: Isaac gains one charge from Habit for every half-heart of damage that Sharp Plug deals, effectively granting double the charges when using Sharp Plug.
• (Added in Afterbirth †) Dull Razor + (Added in Afterbirth †) Schoolbag: Using the Dull Razor activates the Habit, but this does not restore its charge, only that of the item in the Schoolbag.
• (Added in Repentance) Larynx: Both on-hit charge effects stack, granting Larynx 2 charges per hit.

Interactions

• (Added in Repentance) (Added in Afterbirth) Glass Cannon: Upon taking damage, (Added in Repentance) Broken Glass Cannon will be half-charged. However, taking damage before the last charge will break the cannon again.