Rainbow Crystal Staff

This sentry hangs wherever you summon it instead of dropping to the floor, and that is the most useful thing about it. Its reach is enormous, well past the edge of the screen, but it cannot shoot through terrain and it prefers whatever is closest. Put it high above your arena with clear sightlines and it picks up things you have not seen yet. Put it in a pit and it spends the fight staring at a wall.

The beams are not really the point. Each one leaves a star behind that detonates a moment later, hits, then hits again before vanishing. Those explosions do not share invincibility frames with each other, so anything sitting in the middle of several of them takes all of it at once. That makes the staff far better against something large and slow that stays inside the cloud than against a fast target clipping through it.

The tooltip line is lifted from an old popsicle advert. The staff also does so much to a player from a position nobody can reach that most organized PvP servers refuse to allow it.