Summon weapons

Minions are summonable creatures that will fight for you (unlike pets). Minions follow the player and can pass through blocks when catching up, though most cannot move through blocks when attempting to attack enemies. They cannot be damaged or killed, and last indefinitely until their buff is cancelled.

By default, a player can only have a single minion summoned at a time. Various boosts can allow multiple simultaneous minions. The maximum number of active minions that can currently be achieved is 9. With minion cap boosts in effect, the same minion can be summoned multiple times, or several different minions can be summoned. Minion cap boosts do not affect light source buffs or pets, as only one of each can be active at a time regardless.

Frost Hydra and Queen Spider are notable exceptions since they cannot move at all, will disappear after a certain amount of time, and do not count toward the minion cap, while still inflicting summon damage.

Sentry-style minions
Sentries are unlike other minions. They are temporary and don't follow the player, rather remaining stationary until their time is exhausted. They also don't count toward the player's minion cap, so other traditional summoned minions will not be affected by summoning a sentry in addition. Multiple sentries can be summoned at once, but two of the same sentry cannot.

Armor
The following armor sets specifically affect Minions:

Accessories
The following accessories specifically affect Minions: