mtg how many instants in a commander deck MTG: Duskmourn Ratio help for commander :

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That could be legend-matter or artifact heavy decks, or perhaps even your latest Tom Bombadil brew

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Also, there are situations where you dont want to trigger Prized Amalgam, for instance, you play around Ugin minus ability or vs Anger of the Gods and you have Silversmote Ghoul/another Amalgam triggered to return at your endstep, or fetchland + Bloodghast ready to return your 3/3s on the opponents endstep

Its less good for setting up when you cant immediately capitalize on whats in the yard