What it does
"Armour of Shrieking Souls" isn't a standard Magic keyword or recognized ability—it appears to be either a made-up name, a misremembered card, or something from a non-official source. There's no such mechanic in the official MTG rules or any printed card I can verify.
If you encountered this on a card, double-check the exact name and oracle text using Gatherer or Scryfall, the official rules databases. Card names sometimes get garbled, and the actual ability matters far more than a flavorful title. For example, you might be thinking of equipment with menace, ward, or a sacrifice-triggered effect.
If you can share the precise card name or its rules text, I'll happily break down what it does, the nuances people misplay, and how it performs in Commander. Accuracy matters too much to guess here.
Iconic cards with Armour of Shrieking Souls
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