The shape works well because it is easy to shuffle, comfortable to hold, and practical for game play
In the command zone, he's likely to have the same problem as my mono-black Sheoldred deck
The lower their life totals get, the more likely they'll be to make unfavorable blocks and the less likely they'll be to make bold, risky plays
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
Damage is dealt either by creatures or by spells