Compared to other extra-turn sorceries like Time Warp and Alrund's Epiphany, Temporal Mastery's miracle cost can provide you with an early game advantage at a converted mana cost of just two mana
Much like the Overlord of the Hauntwoods, this blue Overlord can come down as early as turn three with its impending ability, becoming a creature after four turns pass
The reason is simple, if you dont deal with something like Kessing Flamebreather immediately, and most of these cards have 3 toughness, you can easily lose in two turns
Why wouldnt it
Sure, you only get one of the three cards into your hand, but the others going into your graveyard is easily exploitable
Soldevi Machinist and Vedalken Engineer are 1/1 creatures, but Renowned Weaponsmith comes in at a 1/3