mtg changeling commander deck Custom Sliver Overlord Tribal EDH Changeling (This card is every creature type.) Changeling Control : r/MagicArena

Im not sure if it is strong enough to really see play in that format, but most of the formats removal is mono-colored so I have a feeling it is probably better than the small-to-no amount of play it will see

Then, all of your opponents, not just the one you countered a spell, cannot cast noncreature spells for the rest of the turn

This is done with cards like Thornbite Staff or Derevi, Empyrial Tactician which require conditions for untapping your creatures reliably

Trying to keep pace with a Hierarch when playing a highly aggressive deck is a head slumping experience, and due to the lack of competition most decks with access to the colored mana would choose this over other creatures in the same price range