Whenever one of your dragons is targeted by a spell or ability, you get to blow up a nonland permanent your opponent controls
This life gain then triggers Enduring Tenacity or Starscape Cleric, forcing your opponent to lose another life and setting off an endless cycle of life drain
Were getting a lot of cheap Flash equipment with until end of turn effects recently, so consider how cost reducers for artifacts factor into the equation, because that can turn them from meh to medium pretty quick
Bloomburrow Starter Kit The Bloomburrow Starter Kit is the one Id recommend to someone if I was trying to get them into Magic and didnt have a reason to think one of the Universes Beyond offerings was a better fit for that person
The winning Azorius Control list from the Zendikar Rising Championship had one in the maindeck, which has been stock in recent weeks, but I still believe that number is too low
White decks can enable it quite easily with their reliance on many powerful artifacts and enchantments