Even if your deck isnt a well-oiled competitive EDH machine, it can benefit tremendously from having a recurring source of card draw on the table
However, item cards are different
Oppressive Rays is a great taxing piece that replaces itself with Sram out, and Reprobation is a great way to remove an opposing commanders abilities
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EDHREC players, for example, run this pretty frequently in Tinybones, Trinket Thief, Tinybones, Bauble Burglar, and Tergrid, God of Fright, all commanders that excel leading decks that aim to whittle opponents down to zero resources as soon as possible
The best way to check the foil pattern is to compare the card to a genuine one of the same type