One of the challenges of R&D has with the Invitational card is to maintain the spirit of the original while keeping the card balanced and synergistic with the current block
Kamber, the Plunderer, gives you one life and generates Blood tokens whenever one of your opponents' creatures dies, giving you more instant draw options or letting you goad your opponents' creatures by sacrificing your Blood to his partner, Laurine, the Diversion
A small pro tip (for your sanity): if youre mixing sources, sleeve everything the same
Combine that with any other taxing effects or control spells, and you'll be the one pulling the strings
There is a large debate whether to play 3 Garchomp C with 1 Level Up or 2 Garchomp C with 2 Level Up
+1/+1 counters, -1/-1 counters, poison counters, loyalty counters, filibuster counters (yes, that's real)