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Untapping Grim Monolith and Thran Dynamo, and occasionally even Mana Vault, it grants extra mana even the turn you put it into play and turns what was supposed to be a one time boost of mana into a bigger continuous boost of mana while having additional side uses untapping other things, with the traditional creature worth untapping being Phyrexian Colossus

But to consistently get that cost reduction you would need a good amount of Pans in your deck and there aren't really many I would consider worth playing

Jacob Hauken, Inspector // Hauken's Insight Get a clue Jacob Hauken, Inspector is the most mundanely-named character in all of MTG

Ill give the Simic commander credit, though