For example, if you control Johann, Apprentice Sorcerer ("Once each turn, you may cast an instant or sorcery spell from the top of your library") and Promise of Aclazotz is on top of your library, you can cast Foul Rebirth, but not Promise of Aclazotz
There are tons of ways to capitalize on Urabrask, among the best include pairing it up with other cards that have similar effects
Narset, Jeskai Waymaster Narset, Jeskai Waymaster is an interesting take on a spellslinger commander that rewards you after casting your flurry of spells for cards like Thunderdrum Soloist and Archmage Emeritus, and ensures that you have another good turn when you untap again
You will get Shinedust regardless of the rarity of the duplicate
this allows the player to develop a resource advantage which can often widen in the mid-game and late game
With a small pit developing in your gut, you reveal a Full House