
Permanents don't untap during their controllers' untap steps.
At the beginning of each player's upkeep, that player chooses a permanent for each card in their graveyard, then untaps those permanents.
Mist of Stagnation has 1 printing, first in Judgment (2002). EDHREC ranks it #25,715 among Commander cards. It appears most in Taigam, Sidisi's Hand decks (29 on EDHREC).
Deck counts from EDHREC.
Cards that show up in the same decks on EDHREC.