What makes Shadowless Charizard so compelling from a market perspective is the value-to-rarity ratio
Theres a lot of sacrifice fodder available to throw -1/-1 counters around, and the proliferate ability can help you to speed up sagas, kill bigger creatures with the previous ability, and grow some of your own creatures
During the Main Phase (Quick Effect): You can Tribute this card, and if you do, take 1 "Hollow-Eyes" Ritual Pendulum Monster from your Deck and either place it into your Pendulum Zone or add it to your Extra Deck face-up
If tails, your Pokemon stays asleep
While theres no denying the power of these cards, theyre not actually too impressive financially anymore
When you have the density of non-token creatures in your deck this is one of the best token producers, taking the crown away from Ophiomancer I think