Lazav, Wearer of Faces

Every prior Lazav has clone-shifted, but always off a graveyard filled by something else: milled cards, discarded creatures, a body dying to fuel the transformation. This version fuses the copying to the investigate loop the character now carries, and the coupling is what makes it tick. The attack trigger does two jobs at once: it exiles any target card from a graveyard (yours or an opponent's, which makes it double as light graveyard hate, since you can strip a flashback spell or a reanimation target you have no intention of ever becoming) and it hands you a Clue. The clone only fires when you cash that Clue in, and only off a creature card that was exiled with it. The timing is the wrinkle: sacrificing a Clue is an instant-speed activation, so you can hold the transformation until the moment it matters (blocks declared, a removal spell on the stack, combat math you want to rewrite mid-turn) rather than committing to a copy on your own attack step. That separation between "which card do I exile" and "when, and into what, do I become" is the whole design axis. The body stays a modest 2/3, but each swing stockpiles both a card and a menu of creatures to become, drawn from the graveyard rather than the battlefield, which means the best copy targets are things already dead. The graveyard becomes a menu of bodies, and every combat step reopens the question of which one to wear.