Zefra Deck Introduction（セフィラ） covers how the Zefra strategy actually plays: what the engine searches, how boards are built, and which cards matter most in current formats.
Deck identity
Zefra is built around Synchro climbing and mid-combo follow-ups. 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 readers who need a practical overview before theorycrafting end boards.
Key cards to know
Priority names in most Zefra lists include Tierra, Source of Destruction, Mammoth Graveyard, Zefra Providence, Nine Pillars of Yang Zing, Denglong, First of the Yang Zing, and Armageddon Knight. Study their search/extend timing first—tech cards only matter after the engine is consistent.
Additional pieces often seen in sample lists: Ash Blossom & Joyous Spring, Emergency Teleport.
Build notes
A practical Zefra 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.