Guardian Emblem

As an action, you can attach the emblem to
a suit of armour or a shield or remove it.
The emblem has 3 charges, regaining all charges
daily at dawn. When you or a creature you can
see within 12m suffers a critical hit while you are wearing the emblem, you can use your reaction
to expend 1 charge to turn the critical hit into a
normal hit instead.
Functions as a holy symbol.