I wouldn't have an issue if you ran it against me in Pauper Commander since it's a one-of, but your milage may vary
Its all about value, drawing cards, setting up powerful synergies, and using your tech upgrades to take over the board
With this starter deck, get ready to ruffle feathers from Motunui to Agrabah
Right now in Standard I think that makes the card iffy for multicolor decks, but Dread Fugue is right at home in Mono-Black Midrange where casting it Turn 1 is basically free
Your biggest problem will be defending Teval, who has no protection against removal, will suffer when cards are exiled, and who must constantly jump into the fray of battle
It is still pretty easy in these cheat and diverse kinds of deck even without the discard