540

White 48
Blue 48
Black 48
Red 48
Green 48
Colorless 40
Lands 70
White 3
Blue 3
Black 3
Red 3
Green 3
Colorless 5
Azorius 3
Dimir 3
Rakdos 3
Gruul 3
Selesnya 3
Orzhov 3
Izzet 3
Golgari 3
Boros 3
Simic 3
Bant 2
Esper 2
Grixis 2
Jund 2
Naya 2
Mardu 2
Temur 2
Abzan 2
Jeskai 2
Sultai 2
Azorius 16
Dimir 16
Rakdos 16
Gruul 16
Selesnya 16
Orzhov 16
Izzet 16
Golgari 16
Boros 16
Simic 16
Bant 3
Esper 3
Grixis 3
Jund 3
Naya 3
Mardu 3
Temur 3
Abzan 3
Jeskai 3
Sultai 3

For dual-colors, 6 are hybrid, 10 are true multi
Each mono and dual color combo gets a planeswalker
At least 2 cards in each mono color have to be artifacts