Question about boss arena Terraria Community Forums

I'm making a boss arena and thinking about creating it underground. If I summon the bosses(EOC,Skeletron/Prime,Destroyer,etc) underground, will they show up? I'll probably be building it around the cavern layer. I just need some clarification before I start building.

Is my loadout good for plantera? (Melee, expert) : r/Terraria

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Rate my boss arena and what else do i need to beat the mechs? : r

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Question about boss arena Terraria Community Forums

Here's my arena, still underconstruction : r/Terraria

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PC - I wish to show what I've built. Feel free to join in.

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Talk:The Twins - Terraria Wiki

Guide/Showcase] The Ultimate Arena (All Bosses, Pumpkin Moon