Uncommon cards are either Trainer cards or they feature unevolved and evolved Pokmon
This was sort of clever but was eventually deemed too subtle
The first is that Threat doesnt work with Rhythm of the Wild, which is something Id be looking to prioritize in a four-mana threat, and the second is that Collision is also fantastic and offers an alternative card for Gruul decks to play that can answer Lyra Dawnbringer, Niv-Mizzet, Parun, Doom Whisperer, or any other huge flier you might be looking for a removal spell for while doubling as a proactive card and even an answer to planeswalkers
Do You Have to Pay for Cipher
Commander decks led by Fire Lord Azula desperately want this card, but so do decks featuring other popular commanders from ATLA like Avatar Aang, Iroh, Grand Lotus, and Fire Lord Zuko