I think of the available legendary creatures in the deck, this one provides the most consistent gameplay playing out of the box, but it's worth discussing the four other legends that can lead it into battle
Phelia, Exuberant Shepherd Phelia, Exuberant Shepherd slipped past me in spoiler season but became one of my favorite Modern Horizons 3 cards
Alesha, Who Smiles at Death Alesha, Who Smiles at Death puts a spicy spin on reanimation decks by putting small, impactful creatures like Master of Cruelties and Unstoppable Slasher into play
The four mana Room offers an Impulse draw during your upkeep, while the other Room can play one free card from exile on each turn
As a bonus, making three 3/3 bodies makes it easier for the player to block effectively, as opposed to a single 9/9 blocker
All the cards here are cube playable and presently I run only five of these