Chaining Versatile Spellcaster?

[subject42]

Is it possible to chain versatile spellcaster to get access to extremely high spell slots for your level? For example, would the hypothetical sorcerer with a CHA of 20 be able to iteratively combine all of his slots to cast 2 level 7 spells, as follows?

Base
1: 7
2: 7
3: 7
4: 7
5: 5

First Transform
1: 1
2: 10
3: 7
4: 7
5: 5

Second Transform
1: 1
2: 0
3: 12
4: 7
5: 5

Third Transform
1: 1
2: 0
3: 0
4: 13
5: 5

Fourth Transform
1: 1
2: 0
3: 0
4: 1
5: 11

Fifth Transform:
1: 1
2: 0
3: 0
4: 1
5: 1
6: 5

Sixth Transform
1: 1
2: 0
3: 0
4: 1
5: 1
6: 1
7: 2

[faceroll]

Nope. He combines his spells to cast a higher level spell he knows, not gain a higher level spell slot.

[subject42]

What if you have a knowstone for a very high level spell?

[Signmaker]

Nope, not even then. Versatile Spellcaster doesn't stack like that. Once is as good as you get.

[FishAreWet]

Nope. He combines his spells to cast a higher level spell he knows, not gain a higher level spell slot.

+1. It really is as simple as that.

[subject42]

Bummer. It was a fun thought experiment, at least.

[Tinydwarfman]

What if you actually did know and could normally cast the spell? Could I spend 4 0th level slots to cast 1 second level?

[FishAreWet]

What if you actually did know and could normally cast the spell? Could I spend 4 0th level slots to cast 1 second level?

No because

He combines his spells slots to cast a higher level spell he knows, not gain a higher level spell slot.

[Thrice Dead Cat]

Doesn't matter if you know a 9th level spell or not: as has already been said, Versatile Spellcaster eats slots to shoot out a spell of a higher level, but does not actually give you a spell slot of that level, meaning it can't be used to go higher.

[faceroll]

What if you have a knowstone for a very high level spell?

It doesn't matter. Versatile Spellcaster doesn't actually create spell slots, so it can't be used with itself.

[Douglas]

Versatile Spellcaster:
Input = Spell Slots
Output = Spell Cast

What the feat produces as its output is not compatible with what it requires as its input.

[Vizzerdrix]

Hmm... Now I question how this works with Heighten Spell.

[Biffoniacus_Furiou]

Versatile Spellcaster does not grant spell slots of the higher level. It simply changes the cost of a spell you know, as follows:

Normal cost to cast spell level X: one spell slot of level X
Versatile Spellcaster cost to cast spell level X: two spell slots of level X-1

You cannot spend four spell slots of level X-2, the feat does not even imply that this would be possible. It says you may spend two spell slots of the same level to cast a spell you know that is one level higher. It's a cost replacement of casting the spell, not a conversion of lower level spell slots into higher level spell slots.