Jade Idol

The Spirit-and-Arcane subtheme had a structural gap: its payoffs were scattered across creatures and instants that rewarded you for casting more of them, but nothing converted that casting tempo directly into a cheap, recurring threat. This is the answer, built around a peculiar on-off animation. Paid up front as a colorless artifact, it sits inert until you feed the deck its native fuel, then snaps to a 4/4 body for the turn, flickering back to life each time the spells flow. The trade is that it never sticks: cast nothing, and it deflates to an artifact again, immune to creature removal precisely because it is not a creature on the off-turn. That intermittent life is the entire design tension. It is a clock that runs only while the engine runs, a beater present for exactly the windows you are already spending mana on triggers, which makes it both hard to answer at rest and worthless when your hand of Spirits dries up. As tribal scaffolding it leans wholly on a deck built to fire its triggers reliably; outside that shell it sits as a do-nothing rock. The design rewards a dedicated archetype over a casual splash, the kind of narrow, on-theme payoff that defined this block's mechanical identity, where the reward only arrived for players willing to commit fully to the engine rather than dabble in it.