Fortunately, you dont have to spend ridiculous amounts of money to afford a fun and competitive Commander deck
The Verdict While Token Triumph has some good cards it suffers the most from the strict pricing restrictions Wizards seems to have put on cards in these decks
While Seal of Cleansing might be more powerful than Disenchant in the present day, Disenchant ruled the roost as the enchantment/artifact removal spell of choice for a majority of Magic history
While it would seem that you want this is as one of the 99 (putting it into a Muldrotha, the Gravetide deck, for example) so that you can take advantage of it as a graveyard piece, you can still do that if its your commander

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The flurry ability of casting two spells in a turn is not something that just goes away from Magic, if anything it will always gain more support as new cards are released