They have the very rare Meld mechanic, where you can pay five mana to fuse them together if theyre both on the battlefield
Flavor and tone aside, there are strong mechanics in Duskmourn with manifest dread, survival, and rooms
When a spell is countered, it can sometimes just be brought back out of the graveyard, but Delay will counter the spell and exile it, suspended with three time counters on it
I was very worried about the early game with this deck and how it would perform without staple card advantage or land acceleration
They almost always occupy chase mythic slots in new sets, though we almost never see more than a handful or one new planeswalker per Standard set
It should draw cards, tutor, remove multiple threats, create tokens, recur your graveyard, drain the table, or end the game