You attempt to halt the spell of a creature in the process of casting a spell. If the creature is casting a spell of 3rd level or lower, its spell is delayed until the start of their next turn, and is then cast as intended with no additional cost. If it is casting a spell of 4th level or higher, make an ability check using your spellcasting ability. The DC equals 10 + the spell's level. On a success, the spell is delayed until the start of their next turn.
When cast on yourself, the spell automatically succeeds.
At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, the interrupted spell is delayed if its level is less than or equal to the level of the spell slot you used.
When cast on yourself, the spell slot used must be equal to or greater than the spell being delayed.
* - which you take when you see a creature within 60 feet of you casting a spell, or as a reaction to a spell you cast
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