Ancient Amulet of Helm

An ancient and scarred/scratched amulet of the archaic symbol of Helm cast from cold dark iron hanging from a similarly unadorned chain. +1 spell casting focus (Add +1 to any rolls for spells cast using this as a spell focus, and +1 to spell save DCs) Also once per long rest can switch out a single prepared spell as a single action (rather than 1hr of prayer)

Notes: Bonus: Spell Attacks, Bonus: Spell Save DC, An ancient and scarred amulet