
+1: Draw a card, then add one mana of any color.
−2: Create a 4/4 red Dragon creature token with flying.
−8: Search your library for any number of Dragon creature cards, put them onto the battlefield, then shuffle.
Sarkhan Unbroken has 4 printings, first in Dragons of Tarkir (2015). EDHREC ranks it #6,383 among Commander cards. It appears most in The Ur-Dragon decks (11,557 on EDHREC).
Deck counts from EDHREC.
Cards that show up in the same decks on EDHREC.