Terraria Guide: How to summon and defeat Event Bosses

In this Terraria guide, we shall discuss how to defeat the big dudes, i.e. the event bosses to obtain that proper loot you’d want to obtain.
Whether it's seasonal or permanently available ones, Terraria has a bunch of in-game events that occur from time to time. These events always have a bunch of content, which can be obtained by defeatin

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I cannot beat any of the mechanical bosses on classic mode. Heres

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Terraria Boss Summon Items Guide