Besides the obvious combo deck with Saheeli Rai, which looks to be just as good as you think it may be, Felidar Guardian may also be a welcome addition to a Panharmonicon deck
You get a one-trick pony here, but you can return from your graveyard to your hand one each of every major spell type, from instants to planeswalkers, but not lands or dorks
P/T Number 338 Language Portugus Legal Formats Brawl, Commander, Competitive Brawl, Historic, Legacy, Modern, Pioneer, Timeless, Vintage Not Legal Formats Alchemy, Pauper, Standard Rulings (7/23/2021) Drizzt's last ability checks his power both at the time the creature dies and at the time the ability resolves
These ten didnt make most top chase cards lists when they were first spoiled, but current market data puts them squarely in chase territory
Bonders' Enclave This is another land on our list, and there's more on the way