Encyclopedia Magica: Amulet of Protection

 

Amulet of Protection

Wondrous Item, rarity varies (requires attunement)

Aura: varies

While wearing this amulet, you gain a bonus to your AC, depending on the rarity of the amulet from the table below.

Bonus	Aura	Rarity
+1	Minor Transmutation	Uncommon
+2	Moderate Transmutation	Rare
+3	Strong Transmutation	Very Rare

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Another item from the old 2e Encyclopedia Magica converted to 5e. While this one might not be the flashiest of items, it is still solid- since who doesn't like flat AC bonuses? It also comes with different power levels for different tiers or play.