Cogwork Assembler (and Saheeli Rai) are the final remnants of a mechanic that once upon a time seemed poised to be a darling of the Kaladesh block
Kodama of the West Tree Legendary creatures with modified text have built-in synergy with equipment
It's no Natural Order, but its only restriction is that your haymaker must come from your hand
Noble Hierarch was a multi-format must have for years in Bant-colored decks, while the printing of Ignoble Hierarch finally provided a parallel option for Jund-colored strategies
Most Lifegain decks are generally black, white, and/or green, most commonly Orzhov (black/white) or Selesnya (green/white), and Golgari (black/green)
I do wish it got counters on itself instead of putting them on the creature, because its going to be pretty brutal when they can remove the thing you worked so hard to grow, and this definitely takes some serious time to get going in too many situations Its a 7-mana 3/3 that makes three 1/1s