This was also the case for Pokmon-GX in the Sun & Moon era as well as Pokmon V during the Sword & Shield era, although they were named differently and had a few different mechanics
Decks in these formats used fast mana like rituals and Ancient Tomb to get an early initiative permanent into play and start reaping the card advantage from the beginning of the game
These cards are perfect for children and pokemon fans who enjoy DIY customization
In the end, this means that Remorseful Cleric might sneak into main decks and will almost certainly be a sideboard staple but only in a specific subset of decks in Modern, thanks to the abundance of graveyard hate options in the format
That said, if you look at this one as a two-time recursion piece for Enchantress or Artifacts decks (or even Superfriends decks) that leaves behind a creature to wield said permanents (or protect them), then this becomes a more interesting card
For example, Jigglypuff's right ear seems to have been lost due to a glitch of some kind, whereas the illustration for Dialga has the Legendary Pokemon look as if its legs have been weirdly extended while the freely generated background it's in looks incredible
