What of red had a single card that dealt damage AND destroyed some gems?
Both these effects are comparatively weak (Beacon Bolt being a notable exception), so combining the two (without requiring a target) might make for a decent spell.
Just spitballin’.
Star of Extinction?
Hmm.. you’re right! Maybe Oktagon should print some more cards like this!
They could save themselves a ton of time coding sets if instead of making so many entirely new cards with untested effects, they instead reworked old cards into more powerful and playable versions. And saving time is something we know they like to do.
Red does have a few cards that could work (land destruction/mana gain + damage).
Most of them seem to have been implemented literally (destroy a land support) but making them destroy gems instead would definitely make them more usable.
Of course gem destruction is one of the most randomly powerful abilities in the game (see: Koth, Demolish, Harness, Spire), so lets not go crazy with it. But more would definitely be nice.