A black cross with a ring circling the center of the cross.
Small (20%) chance to cast the Book of Shadows shield for 7 seconds on Isaac upon taking damage.
Works well in conjunction with the IV Bag, which will provide coins at no health cost while the shield is up.
- A celtic cross is a symbol that combines a cross with a ring surrounding the intersection. In the Celtic Christian world it was combined with the Christian cross and this design was often used for high crosses – a free-standing cross made of stone and often richly decorated.
- Celtic is pronounced "Keltic" because in most Celtic languages, a "C" is pronounced like an English "K".