During each of your turns, you may play up to one permanent card of each permanent type from your graveyard
Dragons of Tarkir gave us five newcomers (Dragonlord Silumgar, Dragonlord Atarka, etc.), Core Set 2019 gave us retrains of the originals (Arcades, the Strategist, Nicol Bolas, the Ravager), Strixhaven added five more as the namesakes of the different schools (Tanazir Quandrix, Beledros Witherbloom, etc.), and the five metal dragons from Baldur's Gate were also given the double creature type (Ancient Bronze Dragon, Ancient Copper Dragon, etc.)
Whenever a Djinn or Efreet enters, destroy it
They give you lots of deckbuilding flexibility because they work well in nearly every type of deck
For this reason Exhale is probably the better card overall, though both are excellent picks