It reads: Whenever you cast your first instant or sorcery spell each turn, exile an instant or sorcery card at random from your graveyard
If the target creature is an illegal target by the time Path to Exile tries to resolve, the spell won't resolve
In terms of my favorite card and commander of the year, however, they tend to be overlooked
If the Vizier of Remedies is a Kitchen Finks, I would also take Collected Company, as leaving Eternal Witness forces them to play a worse three-drop on-curve
As you increase your skills, make academic discoveries, and work to prove your college is the best but beware - second-year knowledge comes with a side of increased danger
Note that Sword of Dungeons & Dragons is a silver-bordered card from Unstable and thus not legal for Commander