Just to make sure this is all RAW:
A level 5 Cleric uses their one use of Channel Divinity to use the Turn Undead effect. The zombies in the area that fail the save are instantly destroyed; the zombies that passed the save are now turned and will move as far away as possible during their turn.
If a higher-CR undead is within the 30-foot range of Turn Undead, which of these statements is correct?
-
The higher-CR undead is turned if it fails the save, and is unaffected if it passes the save.
-
The higher-CR undead creature is unaffected either way.
Best Answer
The only affected undead are those who fail their save.
Roll a d20 save for each undead
Not quite.
If the creature passes its saving throw, it is unaffected.
If the creature passes its saving throw, it is unaffected. Undead only are forced to move away, or be destroyed, if they fail their saving throw.
Example:
Four zombies and a wight (CR 3) are approaching the level 5 cleric. The cleric Turns Undead.
All five roll their saving throw (let's call the DC 13 for illustration purposes)
Zombies roll 5, 9, 17, 13, so two are destroyed and two are not affected at all. They keep on coming, moaning "Brains!"
The Wight rolls an 11. It runs away, since its CR is too high to be destroyed and it failed its save. Had the Cleric been level 14, then the Wight (who failed its save) would have been destroyed.
1 Basic Rules, p. 24
2 Basic Rules, p. 25