mtg merfolk deck commander EDH Namor the Sub-Mariner 100 Magic Cards Custom Deck Blue You may cast Merfolk spells from the top of your library MTG Commander EDH Deck Namor

Yes, you can

Here's a suite of cards that you can swap in to really take advantage of Y'shtola's masochistic side: Vito, Thorn of the Dusk RoseVito, Thorn of the Dusk Rose Exquisite BloodExquisite Blood Sign in BloodSign in Blood NecropotenceNecropotence Bloodthirsty ConquerorBloodthirsty Conqueror Elenda and AzorElenda and Azor Vile ConsumptionVile Consumption Phyrexian ProcessorPhyrexian Processor PurgatoryPurgatory SlaughterSlaughter GreedGreed Bond of AgonyBond of Agony UmbilicusUmbilicus Unfulfilled DesiresUnfulfilled Desires Value vs

Repeatable looting is key for those decks, so it sometimes makes sense even at this cost

There are no basic lands to be found in Ravnica Remastered, but the beloved Shock Lands can be found in abundance here