Basically all Auras have some synergy with the card, because you can play the aura early on to gain a temporary advantage for example play Paralyze on a Savannah Lions and then bounce them back to your hand, to play them again on something more relevant at a later stage of the game for example the same Paralyze but now on a Serendib Efreet
A lava-based Slugma gazes down into steaming hot water, contemplating whether it should take a dip
If your deck already has more than one Energy type, then Crispin can help you attach one to your Pokemon and add the other to your hand
Now for some of the interactions we rather like
Roger commands immense collector interest
The set, one of just nine with all cards perfectly rated in PSAs registry, was first offered at a price of $120 per share ($600,000 market cap) in April 2021