mtg duskmourn all cards I Am · Duskmourn: House of Horror Commander (DSC) #334 · Scryfall Magic: The Gathering Search Delirium As long as there are four or more card types among cards in your graveyard Magic The Gathering Duskmourn Play

Of course, there are a few ways to speed up the process, like using proliferate or cards like Coretapper that allow you to add more counters to Darksteel Reactor

Its an artifact too, which matters because several common blue cards care about artifact synergies

Kolvori, God of Kinship CMC: 2(GG) Type: Legendary CreatureGod Rarity: Rare Stats: 2/4 Ability: As long as you control three or more legendary creatures, Kolvori, God of Kinship gets +4/+2 and has vigilance

If you happen to enjoy one of the other pairs more, build them and let me know how they run for you

Thats good in and of itself, but its not the only thing that this card does