Summon weapons spawn minions and sentries that fight for you while you dodge and support. Minion staves fill your summon slots for passive damage; pair them with whips to tag targets and the Stardust or Spooky armor to raise your minion cap.
The Terraprisma, dropped by the Empress of Light in daytime, is the strongest minion in the game. The Stardust Dragon and Stardust Cell staves are the top craftable options after the Moon Lord.
Each minion staff summons fighters that fill your minion slots — more slots means more minions attacking at once. Summoner armor, the Papyrus Scarab and Necromantic Scroll raise your cap, and whips add tag damage on top.