In practice, though, those casting Clay Champion will likely be pouring green mana into it for the biggest Play-Doh man of them all
Ulrich of the Krallenhorde / Ulrich, Uncontested Alpha Ultimately, I think both sides of Ulrich of the Krallenhorde/Ulrich, Uncontested Alpha are a bit too slow
Control decks fit under this category, with Baral, Chief of Compliance being an (in)famous example of a reactive commander
Examples include the FFXs Farewell or Protection Magic, Tifas Lightning Greaves, and basically anything with Cloud, like Arcane Signet 0333, Dispatch, or Clever Concealment
It digs deep, hides key cards from discard effects, and sets up perfect draws
It doesnt even have to be in those decks, quite frankly