My primary criteria for group slug cards is simple: I need permanent cards that give you a steady advantage, preferably when your opponents do something to maximize the value, but many of them simply trigger on your upkeep, end step, and so on
A solid inclusion
Cards like Awakening ZoneAwakening Zone can give us tokens at a steady pace, where cards like Cadira, Caller of the SmallCadira, Caller of the Small will effectively double any tokens we have, and something like Pest InfestationPest Infestation adds tokens onto an effect we wouldn't hate playing already
Specifically, Vraska's mana value is always 6
Lack of new mechanics make this deck extra accessible for new Draft & Commander players
Amass branches off into enough different strategies (aristocrats, tokens, +1/+1 counters, zombies matter) that its just an altogether good mechanic