How to Beat Test Subject in Slay The Spire 2

The last three bosses you’ll encounter at the top of the Spire, finishing Act 3, are incredibly difficult. One of these is the Test Subject, and it will really push your defenses and how quickly you can defeat enemies!
![For CMOS chains, reliability against bit-flip errors increases exponentially with bias voltage but sub-exponentially with chain length, creating a performance envelope where a fixed dissipation budget is best utilized by minimizing chain length and maximizing bias voltage - a relationship governed by the circuit’s characteristic timescale [latex]\tau\_{0}=\frac{e}{I\_{0}}e^{V\_{\rm th}/(nV\_{T})}[/latex].](https://arxiv.org/html/2603.04658v1/2603.04658v1/x3.png)


![A triangular lattice configured with alternating single-particle hoppings-[latex]J_1[/latex] and [latex]J_2[/latex]-creates effective geometric frustration and a π-flux on each triangular plaquette, which is mathematically represented by a linearized one-dimensional chain Hamiltonian containing nearest-neighbor and next-nearest-neighbor couplings.](https://arxiv.org/html/2603.04498v1/2603.04498v1/x3.png)


