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</>
English Translation
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</>