IgnorePreviouslyPickedEntities (spell flag)

IgnorePreviouslyPickedEntities is a spell flag. For spells and other actions that can select multiple targets, this flag determines whether those targets must be distinct. For example,  Scorching Ray does not have this flag which means all of its rays can be targeted at the same creature. On the other hand,  Command has this flag so a single target cannot be selected twice when upcast.

In general, multi-target damaging actions like Scorching Ray are not restricted with this flag, while multi-target control spells like Command are. However, there are some exceptions such as upcasted  Blindness or  Slow (but only when cast at level 4). For these spells, a single target can be chosen multiple times, forcing it to make multiple saving throws against the effect.

While not specifically related to this flag, all spells cast with  Metamagic: Twinned Spell are similarly restricted to targeting distinct creatures.

List of actions with IgnorePreviouslyPickedEntities

Name	Type	Cost/Recharge	Range/Area	Roll	Effect
Animal Friendship	Level 1 spell	+	18 m (60 ft)	WIS Save	Applies  Charmed
Animate Dead: Flying Ghoul	Level 5 spell	+	3 m (10 ft)	-	Summons  Flying Ghoul
Animate Dead: Flying Ghoul Flock	Level 6 spell	+	9 m (30 ft)	-	Summons  Flying Ghoul
Animate Dead: Ghoul	Level 5 spell	+	3 m (10 ft)	-	Summons  Ghoul (Animate Dead)
Animate Dead: Ghoul Pack	Level 6 spell	+	9 m (30 ft)	-	Summons  Ghoul (Animate Dead)
Animate Dead: Skeleton	Level 3 spell	+	3 m (10 ft)	-	Summons  Skeleton (Animate Dead)
Animate Dead: Skeleton Squad	Level 4 spell	+	9 m (30 ft)	-	Summons  Skeleton (Animate Dead)
Animate Dead: Zombie	Level 3 spell	+	3 m (10 ft)	-	Summons  Zombie (Animate Dead)
Bane (spell)	Level 1 spell	+	9 m (30 ft)	CHA Save	Applies  Bane
Bear's Endurance	Level 2 spell	+	1.5 m (5 ft)	-	Applies  Bear's Endurance
Bless	Level 1 spell	+	9 m (30 ft)	-	Applies  Bless
Bull's Strength	Level 2 spell	+	1.5 m (5 ft)	-	Applies  Bull's Strength
Cat's Grace	Level 2 spell	+	1.5 m (5 ft)	-	Applies  Cat's Grace
Charm Person	Level 1 spell	+	18 m (60 ft)	WIS Save	Applies  Charmed
Command	Level 1 spell	+	18 m (60 ft)	WIS Save
Command: Approach	Level 1 spell	+	18 m (60 ft)	WIS Save	Applies  Command: Approach
Command: Drop	Level 1 spell	+	18 m (60 ft)	WIS Save	Applies  Weapon Dropped!
Command: Drop (Undead)	Level 1 spell	Long rest	18 m (60 ft)	WIS Save	Applies  Weapon Dropped!
Command: Flee	Level 1 spell	+	18 m (60 ft)	WIS Save	Applies  Command: Flee
Command: Flee (Undead)	Level 1 spell	Long rest	18 m (60 ft)	WIS Save	Applies  Command: Flee
Command: Grovel	Level 1 spell	+	18 m (60 ft)	WIS Save	Applies  Command: Grovel
Command: Grovel (Undead)	Level 1 spell	Long rest	18 m (60 ft)	WIS Save	Applies  Command: Grovel
Command: Halt	Level 1 spell	+	18 m (60 ft)	WIS Save	Applies  Command: Halt
Danse Macabre	Level 5 spell	Long rest	9 m (30 ft)	-	Summons  Ghoul (Danse Macabre)
Eagle's Splendour	Level 2 spell	+	1.5 m (5 ft)	-	Applies  Eagle's Splendour
Enhance Ability	Level 2 spell	+	1.5 m (5 ft)	-
Fiendish Charm	Level 1 spell		18 m (60 ft)	WIS Save	Applies  Charmed
Fox's Cunning	Level 2 spell	+	1.5 m (5 ft)	-	Applies  Fox's Cunning
Hellfire Curse	Level 1 spell		9 m (30 ft) 6 m (20 ft) (Radius)	WIS Save	Applies  Hellfire Curse
Heroism	Level 1 spell	+	1.5 m (5 ft)	-	Applies  Heroism
Hold Person	Level 2 spell	+	18 m (60 ft)	WIS Save	Applies  Hold Person
Hound of Ill Omen	Action	+ 3 Short rest	18 m (60 ft)	-	Summons  Nimbus
Invisibility (spell)	Level 2 spell	+	1.5 m (5 ft)	-	Applies  Invisible
Longstrider	Level 1 spell	+	1.5 m (5 ft)	-	Applies  Longstrider
Mass Cure Wounds	Level 5 spell	+	18 m (60 ft)	-	3d8 + Spellcasting modifier⁠Healing
Mind Tax	Action	Short rest	18 m (60 ft)	-	1d10⁠Psychic Applies  Temporary Hit Points
Mummy's Lullaby	Action	+	18 m (60 ft) 6 m (20 ft) (Radius)	-	Applies  Sleeping
Owl's Wisdom	Level 2 spell	+	1.5 m (5 ft)	-	Applies  Owl's Wisdom
Psionic Suggestion: Drop	Level 1 spell		18 m (60 ft)	WIS Save	Applies  Weapon Dropped!
Psionic Suggestion: Flee	Level 1 spell		18 m (60 ft)	WIS Save	Applies  Command: Flee
Psionic Suggestion: Grovel	Level 1 spell		18 m (60 ft)	WIS Save	Applies  Command: Grovel
Psionic Suggestion: Halt	Level 1 spell		18 m (60 ft)	WIS Save	Applies  Command: Grovel
Psionic Suggestion: Hush	Level 1 spell		18 m (60 ft)	WIS Save	Applies  Silenced
Revivify	Level 3 spell	+	9 m (30 ft) 9 m (30 ft) (Radius)	-
Sleep	Level 1 spell	+	18 m (60 ft)	-	Applies  Sleeping
Slow	Level 3 spell	+	18 m (60 ft)	WIS Save	Applies  Slowed