Therions Deck Introduction（セリオンズ） covers how the Therion strategy actually plays: what the engine searches, how boards are built, and which cards matter most in current formats.
Deck identity
Therion is built around Link climbing and board-building routes. The core loop is to convert early searches and extends into a resilient board, then use follow-up to punish overextension.
This overview is especially useful for players who want a clear engine identity and a stable going-first plan.
Key cards to know
Priority names in most Therion lists include Therion "Bull" Ain, Twin Swords of Flashing Light - Tryce, Super Quantum Red Layer, Gagaku-P.U.N.K. Crash Beat, Tanngrisnir of the Nordic Beasts, and Tearlaments Merrli. Study their search/extend timing first—tech cards only matter after the engine is consistent.
Additional pieces often seen in sample lists: Kewl Tune Mix, Mystical Elf.
Build notes
A practical Therion build usually keeps a dense engine package, enough extenders to play through one interruption, and a flexible non-engine slot for hand traps or board breakers depending on the expected metagame.
When testing, track which starters are brick-prone and which extenders are redundant. Cut low-impact one-ofs before cutting engine density.
How to practice
Solo combo until you can sequence the main line without hesitation, then practice interrupted lines (Ash, Imperm, Nibiru windows). After that, tune ratios for your local or Master Duel ladder meta.
Use the related cards section below as a checklist while refining your deck list.