While holding this shield, you have advantage on saving throws against spells and other magical effects, and spell attacks have disadvantage against you.
Spellguard Shield in the 2024 rules
The 2024 Dungeon Master’s Guide revised the magic items, and the SRD 5.2 carries the new text. What changed:
Same rarity and attunement; the text is reworded for the 2024 rules glossary.
Type
Armor (Shield)
Rarity
Very Rare
Attunement
Required
While holding this Shield, you have Advantage on saving throws against spells and other magical effects, and spell attack rolls have Disadvantage against you.