They mainly used Skirge Familiar with Soul Feasts to creature a near infinite card-drawing engine
Of course, given his artificer reference as an MTG card, hes given the most popular color combination of Azorius
Perhaps the most consistent wall card is Mimikyu , a phenomenal one-prize card that has been played in multiple control decks since its printing in Paldea Evolved
No single example captures this quite like Disdainful Stroke, a card which offers the opportunity to significantly trade up on mana with the drawback that it can only trade up
There are 119 multicolour cards: 28 Selesnya (white/green) 22 Boros (white/red) 19 Azorius (white/blue) 15 Orzhov (white/black) Eight Naya (red/green/white), and Mardu (red/white/black) Seven Bant (green/white/blue) Five Jund (black/red/green) Three Gruul (red/green), Abzan (white/black/green), and WUBRG (white, blue, black, red, green) Two Esper (white/blue/black), and Jeskai (red/white/blue)
Having those two things co-exist, while still capturing the feel of the set, is a huge win