Figuring out which colors are, open, can be overwhelming, but when you are first starting out, try not to overthink it
You can run more in the sideboard, but you dont need more than one to start with since its super situational and youll only likely ever need it once if at all in a game
The sweeper suite is rounded out in the sideboard with a second Depopulate and fourth Temporary Lockdown
This is the distillation of what Ive learned over the last four years tunings these decks for Grand Prix and Pro Tours
JIN SAKAI, GHOST OF TSUSHIMA Next on my brewing list (when the Secret Lair arrives, of course!) is Jin Sakai, Ghost of Tsushima
At the upkeep, when you need specifically a land or a spell