Magical Ambush
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Magical Ambush is a togglable passive gained by Arcane Tricksters at Level 9. Magical Ambush allows the Rogue to circumvent their target's defenses when casting spells while hidden.
Description
While you are 
Hiding, your targets have 
Disadvantage on 
Saving throws against your Spells.
Condition: Magical Ambush
Magical Ambush
- Affected entity is hidden. Creatures have Disadvantage on Saving throws against its spells.
How to learn
Classes:
- Class level 9: Arcane Trickster