English (Source)
Opens a menu with different ranks which you can promote a tower to, giving them one of the following buffs depending on which rank they were promoted to:
Disciple: <Keyword>EBuffType::ENLIST_RECRUIT</>
Invoker: <Keyword>EBuffType::ENLIST_VETERAN</>
Sharpshooter: <Keyword>EBuffType::ENLIST_SPECIALIST</>
Berserker: <Keyword>EBuffType::ENLIST_COMMANDER</>
Oppressor: <Keyword>EBuffType::ENLIST_OPPRESSOR</>
Korean Translation
서로 다른 계급으로 타워를 승급할 수 있는 메뉴를 열며, 승급한 계급에 따라 다음 버프 중 하나를 부여합니다:
제자: <Keyword>EBuffType::ENLIST_RECRUIT</>
소환사: <Keyword>EBuffType::ENLIST_VETERAN</>
명사수: <Keyword>EBuffType::ENLIST_SPECIALIST</>
광전사: <Keyword>EBuffType::ENLIST_COMMANDER</>
억압자: <Keyword>EBuffType::ENLIST_OPPRESSOR</>