Wrenn and Six
One of the most groundbreaking planeswalkers in Modern Horizons is Wrenn and Six. It has a rather strong plus one ability that is already compared to the Crucible of Worlds, which is one of the staple Modern artifacts.
Wrenn will definitely find its way into Ponza decks, since the color scheme is fitting and the cost of only two mana is fantastic.
It still won't hold on the current level of pricing, but it can't go too low either, so expect it to settle at around $10-15 range.
Published Jun. 5th 2019
