Angel statue granting Random Options to Cursed Knight's Shield.
If the curse is removed with a low chance, you can get Bloody Knight's Shield.
There is a story that you can obtain a shield with tremendous power that is completely purified with an extremely rare probability??

When used, grants 2 Random Options to Cursed Knight's Shield.
Caution! - When Random Options are granted, refine level and card slots of Cursed Knight's Shield are reset. In addition, there is a low chance that the Cursed Knight's Shield can be transformed into Bloody Knight's Shield or Purified Knight's Shield.

[iRO Description]
Angel Idol gives 2 random option to [Cursed Knight's Shield].
If the curse is lifted with a low probability, [Bloody Knight's Shield] can be obtained.
There is a saying that it can be completely purified with an extremely rare probability, and thus obtain a shield of immense power...
Caution! - When used, the refining level and card slot of [Cursed Knight's Shield] are reset. Also, with low probability, [Cursed Knight's Shield] can be transformed into [Bloody Knight's Shield] or [Purified Knight's Shield].