I began to list them all for one of my player :
Spells that can be made Persistent (with 7, 8 and 9th level slots and without special feats/PrC combos)
Thanks to look for error and omissions.
PHB :
Comprehend Languages (1)
Deathwatch (1)
Detect Chaos/Evil/Good/Law (1)
Divine Favor (1)
Entropic Shield (1)
Obscuring Mist (1)
Find Traps (2)
Helping Hand (3)
Invisibility Purge (3)
Locate Object (3)
Meld into Stone (3)
Prayer (3)
SC:
Ice gauntlet (1)
Nightshield (1)
Nimbus of light (1)
Sign (1)
Spell flower (1)
Aura against flame (2)
Balor nimbus (2)
Body blades (2)
Divine insight (2)
Extend tentacles (2)
Healing lorecall (2)
Inky cloud (2)
Shroud of Undeath (2)
Veil of shadow (2)
Anarchic storm (3)
Axiomatic storm (3)
Blade of Pain and Fear (3)
Cloak of Bravery (3)
Corona of Cold (3)
Darkfire (3)
Grace (3)
Holy storm (3)
Mantle of Chaos/Evil/Good/Law (3)
Ring of Blades (3)
Sonorous Hum (3)
Unholy Storm (3)
Visage of the Deity, Lesser (3)
Spells that can be made Persistent (with 7, 8 and 9th level slots and without special feats/PrC combos)
Thanks to look for error and omissions.
PHB :
Comprehend Languages (1)
Deathwatch (1)
Detect Chaos/Evil/Good/Law (1)
Divine Favor (1)
Entropic Shield (1)
Obscuring Mist (1)
Find Traps (2)
Helping Hand (3)
Invisibility Purge (3)
Locate Object (3)
Meld into Stone (3)
Prayer (3)
SC:
Ice gauntlet (1)
Nightshield (1)
Nimbus of light (1)
Sign (1)
Spell flower (1)
Aura against flame (2)
Balor nimbus (2)
Body blades (2)
Divine insight (2)
Extend tentacles (2)
Healing lorecall (2)
Inky cloud (2)
Shroud of Undeath (2)
Veil of shadow (2)
Anarchic storm (3)
Axiomatic storm (3)
Blade of Pain and Fear (3)
Cloak of Bravery (3)
Corona of Cold (3)
Darkfire (3)
Grace (3)
Holy storm (3)
Mantle of Chaos/Evil/Good/Law (3)
Ring of Blades (3)
Sonorous Hum (3)
Unholy Storm (3)
Visage of the Deity, Lesser (3)