
Return each creature card with mana value X or less from your graveyard to the battlefield. Exile those creatures at the beginning of your next upkeep. Exile Rally the Ancestors.
Rally the Ancestors has 3 printings, first in Fate Reforged (2015). EDHREC ranks it #11,220 among Commander cards. It appears most in Polukranos Reborn // Polukranos, Engine of Ruin decks (1,224 on EDHREC).
Deck counts from EDHREC.
Cards that show up in the same decks on EDHREC.