Kalain, Reclusive Painter This is a tough category to narrow to one, but Kalain is the pick here because of the new archetype she helped fuel: red-black treasure
They're all super strong in their respective archetypes, and will see wide adoption rates across the board
This is probably an integral piece to make Rasaad yn Bashir as Commander finally work, and you won't have a hard time finding white creatures with less than 3 power, so Delney, Streetwise Lookout could also be a Commander of its own for go-wide white weenies
Tibalt's Trickery Four copies of Violent Outburst, three Emrakul, the Aeons Torns, 51 lands, and one Tibalt's Trickery are all you need for a Modern deck that can win games
1 Virtue And Valor Wilds Of Eldraine Our pick for the best Commander precon for new players is Virtue and Valor from Wilds of Eldraine
Clearly, in one of those trials, he encounters [casthaven]Cruel Reality[/casthaven], watching one initiate (Djeru, by the looks of it) drown another