In fact, Primeval Titan has been the face behind some of the most degenerate decks in Modern, starting with the Cloudpost deck that was prevalent in the initial days of the format, to the Red-Green Valakut deck, and then the Amulet Titan deck both in its degenerate form with Summer Bloom, and the more toned down version we see today with Dryad of the Ilysian Grove and Urzas Saga
Having a creature that your opponents cant mess with is a valuable tool in your Magic: The Gathering deck
They block and offer up a sacrifice to your first strike + deathtouch combo
Damage marked on permanents won't be removed until you actually get to the cleanup step (which will happen after your second end step), and "until end of turn" and "this turn" effects won't end until the cleanup step either
Now you'll exile three cards from your library instead
Beseech the Mirror Eliana: I imagine this pick is far less surprising coming from me