Aegis of the moment

When you are hit with a weapon or spell attack
while wielding this shield, you can use a reaction
to activate this magic item. When you do so, you
take no damage from the attack, and you disappear
in a flash of light, only to reappear at the start of
your next turn. While you have disappeared you
are incapacitated but cannot be targeted or tak
damage from any source. The shield can't be used
this way again until the next dawn.