Spider Staff

No boss stands between you and this one. Most players have already stumbled into a Spider Nest while exploring pre-hardmode, and the moment the world turns, Black Recluses start spawning in it. One trip back with a decent weapon covers the fangs. For a summoner it is the strongest thing available before any mechanical boss dies.

A spider sprints at its target, latches on and grinds away while attached, applying Acid Venom the entire time. They climb background walls and jump much higher than most ground minions, so a vertical arena does not strand them, and they grow wings to follow you when there is nothing to climb. Watch the knockback. Several latched spiders will shove a lightweight enemy around the arena, sometimes carrying it out of your reach and sometimes dragging it straight into your face.

The staff cycles through three visually distinct spiders in a fixed order, and all three behave identically. What matters is that spiders of the same type share invincibility frames on a target. The first three attack freely without interfering with each other. The fourth, fifth and sixth each contribute much less than the ones before them. Past six, additional spiders add nothing at all against a single target, so a build with more slots than that should spend the surplus on a different summon.

They only look for targets within roughly fifty tiles, and they break off and return once you get far enough away from them. That is fine in a built arena and awkward if you kite in long loops, since a spider recalled mid latch has to run the whole way back before it does anything again.

Fabled is the roll to aim for. Worth knowing that until a mechanical boss goes down, nothing else in the game applies Acid Venom except its larger sibling, the Queen Spider Staff. The pair cover a debuff no other weapon can reach in that window.