one piece booster box A Fist of Divine Speed (OP-11) 6 Special cards Two Legends Booster Box -

1 Non-foil showcase or borderless rare or mythic rare card Can be 1 of: 13 Showcase rares (54.2%) 6 Showcase mythic rares (12.5%) 5 Borderless rares (20.8%) 5 Borderless mythic rares (10.4%) Or Kellan, the Fae-Blooded, available in both the borderless and showcase Adventure treatment

Then we can -3 her to either pump the Witch-King to kill with +X/+X where that is your Swamp count, or -X/-X to kill an opposing critter

It's a very similar effect to another card that came out in a Magic: The Gathering set earlier this year: Bristly Bill Spine Sower

I can't wait to see how this archetype is fleshed out in future setsperhaps we'll see gates on a new plane beyond Ravnica