There are cards with absolutely insane, broken effects that never see success because of the high amount of resources they require to be activated, resources that from a realistic point of view you are rarely going to be met
A Sneaky Eye: Umbreon VMAX isnt necessarily an obvious all-star, but it has the potential to shift the Standard format a good bit
Upon release in 2018, KeyForge sold well and earned praise, but it has a long way to go in terms of escaping Yu-Gi-Oh!'s legacy
To summarize it in very brief: you play and evolve Pokmon from your hand onto the field and charge them up with energy types to allow them to attack
Here is a list of some of the potent green card quality effects that I consider too narrow for general (de-powered, non-combo) drafting use and as such not able to qualify for this list
I stumbled on your article by first seeing some very strange and unique art on a blue card on Ebay