This creature can't be blocked by more than one creature
Though this list is looking more at the flavour of the cards, it also fits really nicely with what the card does: you gain control of a creature in an opponent's hand, give it haste so it can hit its owner, and then callously sacrifice it at the end of the turn
A few clarifications for those readers who are unsure how Omen Machine (and such similar effects instructing players to cast a card) works: When an effect instructs a player to cast a card ("if able"), and there is no word "may", that means that the player has no choice, and is forced to cast the card, if it can be legally cast
And due to the popularity of the aforementioned Slimefoot as a budget commander, Grismold was overshadowed
And Arena players probably have eight copies already, so you dont need to craft any more
Shaman of the Pack is one of the best payoffs for running elves in formats like Pioneer