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☄️5e - Spell Save☄️
Many spells specify that a target makes a saving throw to avoid some or all of a spell’s effects. The spell specifies the ability that the target uses for the save and what happens on a success or failure. Here’s how to calculate the DC for your spells:
Spell Save DC = 8 + spellcasting ability modifier + Proficiency Bonus
If you are a Martial Class and a Feature asks you to use your Spell Save DC, your Spellcasting ability for that DC is your highest out of INT, WIS, or CHA.
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Player’s Handbook 2024