Sab-Sunen, Luxa Embodied

The parity clock is the whole design. At the beginning of your first main phase it grows by a +1/+1 counter, and that single tick flips it between two states: on an odd count it draws two cards but can neither attack nor block, on an even count it can swing (with reach, trample, and indestructibility) but drew nothing that turn. There is no way to hold both modes at once, because the counter arrives whether you want it or not; the card advances its own clock. What that produces is a rhythm of alternating turns, a locked-down draw-two on the odd beat and a 6/6-or-larger indestructible attacker on the even beat, with the body climbing every cycle regardless of which half you are in. Most engine-versus-beater tension asks the pilot to choose between roles; this one resolves the choice by strict alternation, a cleaner way to state the same problem than any activated toggle would allow. The indestructibility matters most on the attacking beats, since it turns the trample-and-reach body into a threat that survives the block math an opponent would normally use to stall it. Zero counting as even means it can block the moment it lands, before the engine has started turning, which quietly softens the early game relative to a pure draw-engine God: the first vulnerable window comes not on cast but on the first main phase after, when the opening tick locks it out of combat entirely.