As stated, it's still early since the set released so this list could change, but we'll update it on a regular basis.
6 Extravagant Replication Its Only Extravagant If You Cant Afford It I went back and forth about which card to put in this slot, as there are a number of similar cards that produce effects like this on your upkeep (Followed Footsteps, Endless Evil, Progenitor Mimic), but, at the end of the day, the freedom provided by Extravagant Replication was too much to deny
Admittedly, Temporal Manipulation might not be the strongest extra-turns engine, but its functionally identical to Time Warp which is already banned
Adorable Meloetta EX from the Korean CP6 Special Set, card 011/020 R, featuring sparkling holo art and two powerful attacks
Then queue it through Buffer across whichever channels are right for what you sell