Talk:Hallowed Chest/@comment-26821570-20150726050112/@comment-4801981-20150803220721

I believe the keys become obtainable as soon as you enter Hardmode and the chests are openable after you've defeated Plantera, and for killing the mechs you might want to check the Daedalus Stormbow. With Jester arrows it wrecks the Destroyer in under 2 minutes and ichor arrows own the other mechs.

The Hallowed Mimic needed for the Daedalus are pretty easy if you have an arena, and you can summon them with a chest and a key made from the Soul of Light.

I do not know if this relevant to you anymore but maybe it'll make somebody's life a bit less painful.