I feel like this is a deck that will be fun to tinker with over the years as better creatures come out and there will never really be a solution. Neyith is just fun, replaces your fighters with cards, and gave us a commander that cares about something we didnt quite have a commander for
On the other hand, Pokemon does pins, figurines, deck boxes, coins, counters, sleeves, and all sorts of other (highly collectible) accessories, making the special sets feel like more than just yet more cards
Ajani, Nacatl Avenger Color Indicator: White and Red Legendary Planeswalker Ajani +2: Put a +1/+1 counter on each Cat you control
But since many discard costs have little or no associated mana cost, a deck that pays for things via discard gets to cut out half of those steps
Whenever a permanent you control transforms into a Phyrexian, put a +1/+1 counter on it
If youre the aggressor, youre progressing your plan on two different fronts