Qarsi Deceiver

Morph has always carried a tax disguised as a mechanic: three generic to cast a card hidden, then a separate morph cost, varying by card, to turn it face up later. Every point of that two-step bill competes with the rest of your turn, which is why most morph decks read as mana-starved even when the creature count looks fine. This 0/4 subsidizes that whole face-down economy directly. The tap ability makes a single colorless that is useless for almost everything, welded to three specific actions: casting a face-down creature spell, paying to flip a manifested creature face up, or paying a morph cost. That narrowness is the point. Because the mana it produces can never wander off to your real spells, the body can be priced as a two-mana accelerant without breaking anything, and inside a morph shell it effectively discounts both ends of the cycle: the entry and the reveal. The 0/4 carries the rest of the load. It walls off early aggression and survives most of what a hidden-creatures deck wants to stall against while the unmorph engine assembles, then keeps producing once the board stabilizes. The Wizard line earns it a tribal slot, but the real lineage is the single-purpose mana dork, the accelerant whose output is locked to one job so it can be cheap without warping anything around it. Outside a deck built around face-down creatures, it taps for a resource you cannot spend.