Starting at 5th level, when an undead fails its saving throw against your Turn Undead feature, the creature is instantly destroyed if its challenge rating is at or below a certain threshold, as shown in the Destroy Undead table.
| Cleric Level | Destroys Undead of CR... |
|---|---|
| 5th | 1/2 or lower |
| 8th | 1 or lower |
| 11th | 2 or lower |
| 14th | 3 or lower |
| 17th | 4 or lower |