Kyllä.
Mainittakoon, että vaikka pelaisit minkä tahansa Expertisen omalla main phasellasi, niin castaat sen halvemman spellin kun Expertise on vielä stackissa.
Ote Gatherer-rulingsista:
"While you’re casting your free spell, the Expertise spell is still on the stack. It will be put into its owner’s graveyard after the free spell is cast. The free spell can’t target the Expertise card in your graveyard. It can target the Expertise spell on the stack, but the Expertise spell will become an illegal target before the free spell resolves."