14 Beast, Tragic Hero You Can Hear His Heart Breaking
The restriction means you don't have a critical mass of good proliferate cards to work with nor is it easy to focus on a specific type of counter, like loyalty counters (Superfriends) or +1/+1 counters -- it's possible , sure, but not optimal
My personal favorite battle, Invasion of Ikoria, offers a flexible ability on the front that scales at different points of the game, and then sets up an outright win on the back with a giant creature that features a unique ability of its own to push through massive damage against your opponent
Using the Energy Trans ability of Venusaur, paired with Pokmon Center, you can move your energies around anywhere on your board, allowing you to use Pokmon Center to heal off damage, without the downside of discarding Energy cards, so long as you move all those Energy cards to an un-damaged Pokmon first
The AI Pokemon generator is great for making custom Fakemon images
For that reason, Altair Ibn-LaAhad, and some other Mythic Rare Assassins, got a lot more expensive than expected