Xeno Staff

Most summons fire something that has to physically cross the gap, which means anything quick can simply outrun the shot. This one does not. The laser connects at the instant it goes off, so target speed is irrelevant. The UFO also blinks straight above whatever it has picked instead of flying there, which keeps it in position when a fight moves across the arena at speed.

Duke Fishron and the Empress of Light spend their fights moving faster than most minions can track, and against them a summon that always lands beats one with a bigger number on paper. In a stationary grind against Golem or a wall of event enemies you will get more out of something heavier. The trade is consistency, not raw output.

The UFOs will roam a long way to find something to shoot, and they snap back to you when they get too far out. Manually tagging a target with right click extends that rope considerably, which is worth doing when you want them staying on a boss instead of drifting off to pick at trash.