뇌전 소환

You can borrow a relevant unit from a friend for this achievement. You can run Difficulty 1 in Echo of War without spending stamina (after your 3 weekly runs). You can also run Forgotten Hall 1.

This achievement has no cultural references in the English and Chinese versions. It is likely specific to the game. Fulguration, which denotes the removal of undesirable tissue using an electric current, becomes particularly apt when applied to a game scenario where a team solely based on lightning seeks victory. Coupled with the term "Beckoner," which implies an invitation or gesture for participation, the achievement suggests a sly invitation to enemies to partake in their own 'electrification'—essentially being defeated by the lightning team. It's a playful and smart incorporation of terminology into the game dynamics. - Credit: Fen