@sw, you have a point. The Bible (Old Testament) makes no such claims; but not all literature concerning the Ark was codified into the OT, there is a substantial amount of contemporary jewish tradition and legend and rabbinical commentary concerning the Ark that dates back to the time when it was the absolute centre of their culture. Many of the "midrashic" tales and apocrypha plainly describe it doing such incredible things.
Bear in mind that the Biblical descriptions are, if you like, the "official" versions. Also note that the Bible clearly states what are important rituals that are to take place when the Ark is approached or brought forth, and just as clearly what happens when those same precautions are NOT taken
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for example, when the Ark is taken by the Philistines at the battle of Ebenezer (I Samuel 4:6-9) because the Israelites don't use it properly, and so lose, the artifact inflicts great suffering and affliction upon the Philistines of Ashdod, then Gath, then Ekron. the Philistine chiefs then return it to Israel who they have miltarily defeated, and it kills there, at Bethshemesh, over 70 people, until the Levites come for it and remove it to a safe place, Kiriath-Jearim, where it stays for the next 50 years until King David comes for it. Whereupin it kills Uzzah who strecthed out his hand to it. David then left it with Obeodom the Gittite for 3 months until he felt it was safe to approach it, then removed it to Jerusalem to the Temple (after it had made the women of Obeodom miraculously fertile.
it's encased in gold, carried on poles, housed in special tents and buildings, drpaed in heavy cloths and behing cloths and screens, no-one dare approach it except the initiated caste of Levites because if you did you's almost certainly die, and there was an exclusion zone around it proclaimed by Joshua; the Ark was not a safe thing to be around.