Whenever the equipped creature deals damage, you can put a +1/+1 counter on a creature, then proliferate
Over the past several decades, grading Pokmon cards has basically become its own science, and you might be surprised at what cards are most coveted by collectors
Importantly, if you are running blue cards that are crucial to your game plan like Thassas Oracle or Flash, you should NOT count those towards your minimum blue card count if you cannot win the game with them exiled
While players might mourn the loss of certain fan-favorite cards (Sisu Empowered Sibling comes to mind!), Fabled brings plenty of new cards to be excited about
Awwwwwwww after a long day at work this was a delightful pick me up
This does still require a lot of setups, which is why it doesnt rank higher than this, but I can see a lot of decks wanting this card and also finding it very rewarding to build around it as the commander