Asceticism , Heroic Intervention , and Simic Charm could help out here
Banner of Kinship Banner of Kinship can provide Coat of Arms levels of board pump, sometimes enough to end the game on the spot, but it also has the failcase of being a complete blank if you have no creatures in play already
Its not too hard to find upgrades (Goblin Kaboomist, anyone?), but its not that unique of a strategy and feels very reminiscent of the Saheeli, the Gifted / Brudiclad, Telchor Engineer deck from C18
As a two-mana play, itll be tough for your opponent to keep your Planeswalker in check early, and its immune to typical removal
Folks that are worried about their life total and expanded usefulness should consider calling up this old friend
Amass is restricted to mostly zombies and orcs at the moment (with one amass slivers exception), but it can still round out some of the thematic decks featuring these creature types