MTG Boyfriend Gift Help

Hi!! I’m dating a huge MTG fan. he probably has like 100 decks (or more). I’m very crafty so I want to paint him either custom cards or a deck box.

I told him I was going to get him a playing mat (I lied) and asked him what he’d want on it. He said he didn’t want creatures, but really cool sorceries / enchantments / lands / artifacts. He also is more of a fan of the blue types(?)

I’ve only played 3 games before, so I have NO clue what would be the best or coolest card (especially one that is conceivable to paint). please send suggestions.

Also - any other custom gift ideas for an MTG fan would be super helpful!

TLDR: making bf a custom MTG gift, need help with picking something cool to paint.