Name that Prestige Class!

[loky1109]

"Although this [ability of the Martyred Champion of Ilmater] is similar to that of the masochism spell, this ability is not evil." Oh, what a relief! In french, it's even worse, with "Although this effect is similar to the masochism spell, this is of course not an evil ability.". Yeah, adding "of course" really supports your point here.

And to balance the two exalted PrC:
What nongood PrC, in its first printing, required its members to not be slaves.

Thayan Knight?

[Beni-Kujaku]

Thayan Knight?

Thayan Knight.

[loky1109]

This prestige class capstone is adding ability modifier to AC gained from prerequisite feat.

[Tzardok]

Thayan knights
Like Thayan days
More often than not
Are hotter than hot

[thorr-kan]

Thayan knights
Like Thayan days
More often than not
Are hotter than hot

You *really* have to stretch Thay-an to match the pronunciation of "a-RAB-i-AN!" of Aladdin. But it's Disturbing how well that scans...

[Inevitability]

This prestige class capstone is adding ability modifier to AC gained from prerequisite feat.

Mantis Mercenary! Pretty cool PrC, even lets you pick what stat to apply (wisdom or intelligence).

This PrC requires Survival and Knowledge (Nature) to enter, and its only 10th-level feature is sneak attack advancement.

[Beni-Kujaku]

Mantis Mercenary! Pretty cool PrC, even lets you pick what stat to apply (wisdom or intelligence).

This PrC requires Survival and Knowledge (Nature) to enter, and its only 10th-level feature is sneak attack advancement.

After the mantis, the Scorpion Heritor! Speaking of arthropods, what prestige class has an ability that reproduces a spell that summons a swarm of vermin, but specifies that this ability only summons a specific kind of insects, that you cannot normally summon with said spell?

[Inevitability]

Disciple of Baalzebul summons 'biting flies' instead of locusts with its 8th-level Insect Plague ability.

This class lets you 'cast' True Seeing by giving up a cantrip, but the spell will immediately end if you do so.

[St Fan]

This class lets you 'cast' True Seeing by giving up a cantrip, but the spell will immediately end if you do so.

Are you talking about the Major School Esoterica of a Diviner Master Specialist?

Anyway, the query is poorly worded... which spell immediately ends? The cantrip? True seeing? Another?

[Inevitability]

Are you talking about the Major School Esoterica of a Diviner Master Specialist?

Nope.

Anyway, the query is poorly worded... which spell immediately ends? The cantrip? True seeing? Another?

You give up a cantrip, this creates a True Seeing effect, but the effect has a duration of 0 rounds and immediately ends.

[loky1109]

You give up a cantrip, this creates a True Seeing effect, but the effect has a duration of 0 rounds and immediately ends.

What if you give up 1st level spell? Will TS duration be 1 round? Or can't you give up anything but cantrips in this manner?

[Inevitability]

What if you give up 1st level spell? Will TS duration be 1 round? Or can't you give up anything but cantrips in this manner?

If you give up a 1st-level spell, the duration will be 1 round.

[ShurikVch]

Soulguard?

OQ

[Inevitability]

Soulguard?

That is it indeed!

[St Fan]

This prestige class can allow you to cast arcane spells 1 level above the maximum level you can cast in a spontaneous caster class if you have Versatile Spellcaster.

[Biffoniacus_Furiou]

This prestige class can allow you to cast arcane spells 1 level above the maximum level you can cast in a spontaneous caster class if you have Versatile Spellcaster.

Sand Shaper?

[St Fan]

Sand Shaper?

Nope.

Desert Insight: As a member of this class, you gain knowledge of additional spells (see the list below). If you were a caster who previously prepared spells (such as a wizard), you can prepare these spells like any other spell to which you have access. If you are a spontaneous caster (such as a sorcerer), these spells are available to you like any other spell you know. You cannot cast a spell of higher level than the maximum spell level you can cast. These spells become options for you when you gain access to the appropriate spell level.

Emphasis mine; this class feature doesn't fulfill the condition I mentioned.

[noce]

This prestige class can allow you to cast arcane spells 1 level above the maximum level you can cast in a spontaneous caster class if you have Versatile Spellcaster.

Exalted Arcanist.

Neither Exalted Spell List nor Spell Knowledge allow this, but Sanctified Spells does: "A 5th level Exalted Arcanist can use sanctified spells as though they were among her spells known".
So for example a Sorcerer 6 / Exalted Arcanist 5 can cast spells up to 5th level, but knows 6th level sanctified spells and can use Versatile Spellcaster to cast them.

[St Fan]

Exalted Arcanist.

Neither Exalted Spell List nor Spell Knowledge allow this, but Sanctified Spells does: "A 5th level Exalted Arcanist can use sanctified spells as though they were among her spells known".
So for example a Sorcerer 6 / Exalted Arcanist 5 can cast spells up to 5th level, but knows 6th level sanctified spells and can use Versatile Spellcaster to cast them.

Probably correct.

The answer I expected was Ultimate Magus, however. Their "Expanded Spell Knowledge" feature allows similarly to have spells known above their maximum spontaneous spell slots available.