Pristine Skywise

Build a control shell around it and the 6/4 body stops being a flier that dies to the first removal spell and starts being a resilient threat that fights through the stack. The trigger keys off any noncreature spell you cast, and the untap is the part that does the work: a Dragon that attacks, gets pointed at, then untaps and gains protection from a color of your choice the moment you cast your end-step instant has rewritten the rules of combat in your favor. Choosing the color after you see what the opponent leans on is the whole engine: protection from red beats the burn, protection from white blanks the exile removal, and the untap lets it hold the ground on the swing-back turn too. The 4 toughness is the honest limit on the design; this is not an indestructible threat, and a cheap noncreature answer that resolves before you can respond still kills it dead. But in a deck already built to chain cantrips, counters, and removal, every one of those spells doubles as a free reset on a flying clock the opponent cannot profitably attack into and increasingly cannot kill. It rewards a noncreature-dense build the way few finishers do, asking you to keep the body protected through your own gameplan rather than holding up a single dedicated answer.