Casting Time: 1 reaction
Duration: 1 round
Save: Intelligence, Wisdom, Charisma
You protect your mind with a wall of looping, repetitive thought. Until the start of your next turn, you have advantage on Intelligence, Wisdom, and Charisma saving throws, and you have resistance to psychic damage.
Note: You take your reaction when you are forced to make an Intelligence, a Wisdom, or a Charisma saving throw.
Bard, Sorcerer, Warlock, Wizard, RogueTags:
Buff, Psionic, WardingSource: Unearthed Arcana
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Other Planes and Effects
Below is information about this spell as it relates to other planes and area of effects (i.e. underwater). Some of the information is pulled official D&D sources (such as books and the twitter feeds of D&D officials), but other information is derived from forums and online discussions. As always, it is up to the DM to decide how they wish to handle spell effects.
Underwater - Verbal Component
Official rules have been verified by Jeremy Crawford - "No rule prohibits verbal components from working underwater. Keep in mind that if you're talking, you're not holding your breath." Hence, while submerged underwater and holding its breath, a creature can cast a spell that requires a verbal component. After casting the spell, if the creature can't breathe underwater, it immediately runs out of breath. The creature can survive for a number of rounds equal to its Constitution modifier (minimum of 1 round).