Test of Spite [3.5.3]

[T.G. Oskar]

Can you use Versatile Spellcaster to cast a higher spell level runestaff than you currently have access to?

E.g. Currently lvl 14, can cast up to level 7 spells, but can I sack 2 7th level spell slots to activate my 8th Spell Level runestaff?

I doubt it, but that depends on what the DMs say and what RAW says. RAW, you expend two spell slots of X level to cast a spell of X+1 level that you know. Runestaffs allow you to expend one slot of a spell level equal or higher than the spell you intend to cast. You aren't considered to know those spells, hence you can't use your Versatile Spellcaster-granted "spell slot" to cast a spell from a runestaff.

But, that's just me.