Here, its a little more forgivable, because Roshans ability is obviously meant to give the Assassin type to your face-down creatures, but he still seriously dilutes the Assassin kindred theme with that ability
Hexplate Wallbreaker: Getting free combats each turn is useful if you are relying more on voltroning
Wither, persist, and the untap symbol are back, and are joined by two new mechanics: chroma and retrace
(For more on linear and its opposite modular, check out my column "Come Together") I bring up linear-ness because it's something designers have to think about with threshold mechanics
This sets up the Dondozo train, which will hopefully be doing a consistent 150200 damage each turn with very little your opponent can do to stop it other than removing Energy cards
Currently there are three Promo Pack versions of Lumra available on TCGPlayer, and theyre all above $190