Almost entirely because of duplicate protection, they have now 100% lured me in as a customer to start seriously playing on MTG Arena and spending money, while also still collecting Common, Uncommon, Rare sets on MTGO (though no longer Mythics, it's too expensive to keep that up)
Until now, the only thing delve made me think of was Tombstalker, and maybe Death Rattle, but mostly because I played a lot of Time Spiral Limited
But it has never been 100% confirmed. Pantellerisco agrees that concept material created by The Pokmon Company and the card games first English-language publisher, Magic: The Gathering maker Wizards of the Coast, could have the chance to spark a new treasure hunt if it appeared
Strike It Rich and Tavern Scoundrel offer fixing for your third color while spinning off a couple cheap artifacts to help out any U/W cards you grab