Rod of the Pact Keeper +2

Rare

Rod of the Pact Keeper +2 Rod, rare (requires attunement by a warlock) While holding this rod, you gain a +2 bonus to spell attack rolls and to the saving throw DCs of your warlock spells. In addition, you can regain one warlock spell slot as an action while holding the rod. You can’t use this property again until you finish a long rest.

Amulet of Protection from Turning

Rare

Amulet of Protection from Turning Rare, Wondrous item, rare (requires attunement) While you wear this amulet of silver and turquoise, you have advantage on saving throws against effects that turn undead. If you fail a saving throw against such an effect, you can choose to succeed instead. You can do so three times, and expended uses recharge daily at dawn. Each time an effect that turns undead is used against you, the amulet glows with silvery blue light for a few seconds.