Lets look at the cards and see what we can learn
Its a lot of value for five mana, and even if the creatures do end up decayed meaning youll get to attack with them exactly once its still more than worth it, as these types of plays usually come before a board wipe, anyways
Warden is there to make a Serra Angel token when needed
These are the most consistent decks in Standard and the most played on the Arena Ladder: Izzet variations (prowess, elementals, lessons): These decks all play a lot of blue and red cantrips/burn/lessons to fill their graveyard and exploit synergies, like lessons in the graveyard, cost reduction, or elemental creatures
Some also have an effect when they enter the battlefield or when they die
Village Rites offers a similar effect for a lower upfront cost, but not allowing you to sacrifice an artifact makes it a bit less flexible, and the Treasure is a huge addition to this effect