Creature Enchantment - Avatar Horror Quantum Misalignment Create a token that's a copy of target creature you control, except it isn't legendary
Tying up money in expensive assets that have a low chance of appreciating is not a good idea, and it can be easy to do so if you're chasing the misprint market
Either way, having 20 creatures in play to win is definitely possible, but you should be winning from there with a simple mass-pump effect like Overrun as well
For example, you can swap this Pokemon's evolution line for a powerful mill combo using Hand Scope and Red Card alongside Ultra Necrozma ex's Shoegaze
Oshawott #11 (Pokemon Japanese Beginning Set HS | Pokemon Cards) prices are based on the historic sales
I could probably go a lot further in breaking down such a flexible archetype, one which can tie into so many other powerful mechanics