Jorn, God of Winter / Kaldring, the Rimestaff Kaldheim brought some MDFCs, but it also saw the return of snow spells
Grindstone mills two and repeats whenever two milled cards share a color so with Painter out, it never stops and decks the target in one activation
Based on what Ive seen so far, you could do worse than a mono-ruby deck all about Sid and the toys he tortures for fun, but you can also dip into emerald or amber (preferably amber) to get access to a wider array of toy tools to play with
The goal of this deck is to raise Vadrik's power to 3, then storm off, generating mana while drawing through our deck until we assemble a game-winning combo
Just remember that Rex's ability is compulsory, so make sure it isn't alone on the field with any 0-cost cards or you'll lose them