When building your deck, another thing youll want to watch out for is card classifications aka tags
Celebrate the stars of Scarlet & Violet and the dawn of Mega Evolution with the Pokmon TCG: Mega EvolutionAscended Heroes expansion
It states that you can turn any number used in any creatures text box into the damage that the Pygmy Giant will deal to another creature, and it just so happens to have the number 487 in its very own flavor text
There's a few other very good proliferate engines, such as Contagion Engine, Thrummingbird, and Guildpact Informant for repeatable proliferate, and Tezzeret's Gambit, Vivisurgeon's Insight, Contentious Plan, and Steady Progress adding proliferate to card draw which is great to have
Notably, there is a cycle of lands that grant Bands with
Given that earlier versions of Omnath touched on Elemental themes and well probably want the two other than Omnath, Locus of Mana in the deck, it might be a good idea to pepper in some cards that care about that where it makes sense