About the Series
Phil Tucker’s second progression series (after Bastion) puts its protagonist in a repeated death-loop arena where the key mechanic is soul grafting — permanently absorbing abilities from defeated opponents. Each loop provides opportunities to face different opponents, gain new grafts, and build toward a soul architecture powerful enough to break free.
The death-loop structure creates natural progression milestones (each iteration is a fresh attempt with accumulated grafts), and the soul-grafting mechanic means every fight has stakes beyond survival: what abilities can you steal from this opponent? Tucker’s system design strength (established in Bastion) carries over — the graft combinations have meaningful interactions and build-crafting depth.
This works for readers who enjoyed Bastion’s system design and want another Tucker series with a different framework. The death-loop structure provides clear progression beats. Early in its run but already demonstrating the author’s strengths. The tradeoff: only two books, so the long-term arc is unknown. The death-loop structure can feel repetitive if the iterations don’t vary enough. If you want a completed series, this isn’t it yet. If you trust Tucker based on Bastion and want in on the ground floor, this delivers his signature system-design quality.
Reading Order
- Immortal Great Souls (2024)
- Immortal Great Souls 2 (2025)
If You Like This Series
- Bastion by Phil Tucker — Same author, different system (aeviternum vs soul grafting); similar quality
- Mother of Learning by nobody103 — Loop structure used for accumulation; completed
- The Perfect Run by Maxime Durand — Loop/save mechanic with accumulated advantage; completed
- Cradle by Will Wight — If you want Phil Tucker’s quality at Cradle’s speed; completed
- Iron Prince by O’Connor & Chmilenko — Combat progression with detailed system design