Double Sealed Throne and Particle Wall
Two Throne stacks replace Particle Wall’s two-Star payment on every play. Add a damage payoff and preserve the Stars needed to start the sequence.
Setup and limits ↗Rare Slay the Spire 2 engines with exact setup requirements, resource ledgers, damage payoffs and failure conditions. Separate from ordinary character build strategies.

Two Throne stacks replace Particle Wall’s two-Star payment on every play. Add a damage payoff and preserve the Stars needed to start the sequence.
Setup and limits ↗Duplicate Decisions, Decisions at campfires, then use one copy to play another. Count the six-Star entry cost, available Skill targets and the copies consumed by Exhaust.
Setup and limits ↗
Keep Star generation matched to spending, then use Child of the Stars or Black Hole to reward the transactions. Cheap energy costs do not make a Star-cost card free …

A zero-cost Hologram+, TURBO and All for One can repeat without drawing. Follow the full cycle, including the Void added each time, before spending Touch of Insanity…

Keep Grand Finale available, draw exactly the cards remaining, and play it before another draw starts a reshuffle. A larger draw effect can miss the same window.

Separate a lack of cards from a lack of Energy, then check the order in which draw, discounts and free plays resolve.