Well, in the past, legendary cards in a main set have had to carry a lot of weight, especially the weight of being commanders that you can use to showcase the set themes
Herd Heirloom A viable mana rock that works for multi-colored creature decks, and it even offers a second ability that generates card advantage or helps kill your opponent (there are so many good creatures with at least 4 power)
If you are going second, or know your opponent will play an Evasive character turn one, follow up with Minnie Mouse Ghost Hunter to give Nick Alert to take most one-cost characters out, or at least make them think twice about questing
Kuzcos Palace Home of the Emperor | Location Kuzcos Palace City Walls ability grants the same well known ability that Kuzco from The First Chapter has
Cantrips, red rituals, and storm cards love being part of the storyline that Birgi weaves
Jetmir, Nexus of Revels I already mentioned my affinity for Naya combat commanders, and Jetmir, Nexus of Revels is part of the reason for that