Take the concept of +1/+1, -1/-1, or level up counters to the next step and you have permanent alterations to a card, or what MTG Arena calls perpetually
3) Use token-friendly text habits A few habits make custom tokens actually usable: Keep rules text short, and only include what the token itself needs
This card also has Proliferate, meaning you can choose any trait that you or your opponent have, and add one to its count
There is also some 3D in duels, mainly when a specific monster is summoned onto the field
Use Friends from the Other Side when your hand is empty and preferably while your opponent is holding key cards in their hand
A couple of tutors like Personal Tutor and Scheming Symmetry ensure you have whatever cards you want to cast perhaps Expropriate to get some extra swings in, Breach the Multiverse to build an imposing board state, or Mnemonic Deluge for an encore of your greatest hits