1. Dominaria United's set Jump/Start packs are a cool idea, but there's not any difference between the packs of the same color. At the same time, DMU's awesome multi-color legends and kicker cards have to stay at home.
2. So, I went looking for another set that I could make Jump/Start packs for, that had a strong thematic identity and I could make each same-color pack different from one another.
3. At first I tried to make packs tied to Kaldheim's Ten Realms, which is certainly very thematic, but since someone would be 'doomskar-ing' two Realms together to form a deck, each deck would be three or even four colors. Too much.
4. Then I found it: Kaldheim's gods. Each god is mono-color (mostly), has one obvious second-banana rare (their backside artifact), and the packs ended up being wildly different.

SPECIAL RULE

Each pack contains two copies of the specific Kaldheim god, one with its front face showing, and one with its back face. Treat them as different cards, not as DFCs. This change also powers down the 'two mythics' packs.