Like previous Commander releases, all of Commander 2019s decks were designed around a central theme, and this year that theme is Mechanics
Here, the best plan is basically to use the White Weenie Challenger Deck as a way to pick up cheap copies of two of the most expensive cards in Azorius and Boros AggroHistory of Benalia and Legion's Landingand then base your upgrade on what you happen to have in your collection
Kwain, Itinerant Meddler There seems to be a bit of a group-hug subtheme on the rabbit cards designed for Commander, and that's certainly where the Peace Offering precon lands
If you somehow cast this spell when it's not a main phase, the second ability still takes effect, but there are no additional combat phases this turn
You may recall our post waaay back in July regarding the upcoming Magic the Gathering Premier Deck Series, Graveborn - well we have a spoiler for you now
Heck, with Light Up the Stage and hasty quasi-Ophidian Robber of the Rich, even the Red deck breaks the first one