To this day, its unknown how many are actually left
At CCC, in the case of a non-authenticated card, the grading report tells you what led to this conclusion
Psychic Non-Evolving Notables Card I have to Justify: Unown G Card that needs a bit more love: Mew-EX from Legendary Treasures (#RC24) Card that needs to be in every Cube: Uxie from Legends Awakened (#43) As a note, I could have put Mew instead of Mew-EX, but I didn't want to rehash my thoughts on the Lost Zone concept like I did for the Relicanth part above
The true problem might come when facing Normal and/or Gemini decks, but the odds of that compared to the hundreds of builds relying on effects are pretty low, making "Wyrm" a powerful ally even if is the weakest on the field just for stall
Full due diligence
(The turn you must wait to use a freshly-played character while they dry is also a much cuter image than Magics summoning sickness.) Being able to add a facedown card from your hand to your inkwell immediately overcomes the common MTG and Pokmon bugbear of finding yourself with no land or energy cards - any Lorcana card with the ink marker around its cost can be turned into ink - and sparks a delicious dilemma about which cards to sacrifice to the inkwell in order to play others
