How to temporarily increase INT from 8 to 20?

I can temporarily increase INT from 8 to 18 with Potion of Intellect, is it possible to temporarily increase INT up to 20?

 

I'm pretty sure potions of intellect stack? If they don't, you can use a mind marvel or revitalizer from therapeutics (work just as good on magick users regardless of aptitude) or maybe the Ring of Dark Magicks for a +1 boost. Things like the brain builder and Vivifier can be used to permanently boost intelligence too, apart from that there aren't very many ways to boost intelligence relative to the other stats.

 

I see, thanks again for your help mate, I''ll see what I can do.

 

To clarify, the boost from the mind marvel and revitalizer are +2 each - I forgot to mention it previously.

 

Potions of intellect don't stack and don't add spell-slots.

However, they can raise your Int from 10 to 20.