Even now that the competitive format has moved on, the card holds value
If you can build up three counters on Slogurk, easy to do in a green/blue deck even without its ability, you can remove them to bounce it back to your hand, recurring three lands from your graveyard to your hand in the process
Kaiju Capture Mission X TRAP Continuous Once per turn, if there are less than 3 Kaiju Counters on this card: You can target 1 "Kaiju" monster on the field
These cards often feature special artwork, language variations, and sometimes exclusive characters that are not found in other regions
Both are marquee flip cards, but would take up valuable mythic slots, and not fit into the origins timelines whatsoever
What is the pull rate for Greninja ex