Dack Fayden 8 An insanely good discard outlet and source of card quality
I already mentioned Timetwister, but it could just as easily be Fireball
We saw a lot of power, with double Student of Warfare / Time of Heroes nut draws and one-creature wins thanks to the fact that if we can fight through our opponent's removal and max level a creature, most of our level-up creatures can win the game by itself, but we also got Time Walked a lot of times and occasionally just played underpowered creatures (a good example of this was against Merfolk, where their creatures were often bigger and more powerful, even without the extra work of spending mana to level up)
its a beloved mechanic that players have seen a lot of in recent sets
Multani, Maro-Sorcerer - $8.80 Set: Urza's Legacy (ULG) Liege sees play in Commander (as a commander and in the 99) and I'm always happy to see it come up in a game BUT at the same time very said
He fits cleanly into colorless shells and artifact strategies that want redundancy and inevitability rather than speed