So as far as strategy goes this card can't do any actual damage but I would consider this card for Time Control alone, I would definitely use this card as soon as possible and add 2 prize cards to your opponent's prize cards, the reason I wouldn't wait late into the game to do this is because it will take awhile to use Time Control once you use it once and your opponent gets to take two prize cards if they defeat it and with a 3 colorless energy card retreat cost you'll want to just keep this card on your bench after you use Time Control once in the beginning of the game
For a deck builder, it is one of the best formats to build for
Righteous Aura You can sink mana into Righteous Aura to lose as much life as you like
Goblin Bombardment and Impact Tremors are some of the most common, while creatures like Adeline, Resplendent Cathar, Scion of the Wild, etc
This time the Duals are all from Foreign White Bordered, two French and one German: Scrubland (LP, German) Badlands (LP, French) Volcanic Island (LP, French)