Mirri, Weatherlight Duelist [Commander 2017] Minotaur Set: Conspiracy: Take the Crown

Set: Conspiracy: Take the Crown Type: Instant Rarity: Mythic Cost: {G} Cast this spell only before the combat damage step

You may have that player shuffle their library

you may have Valakut

Set: Core Set 2019 Prerelease Promos Type: Legendary Creature — Elder Dragon Rarity: Mythic Cost: {1}{U}{B}{R} Flying

you get {E} (an energy counter)

Mirri, Weatherlight Duelist [Commander 2017] Minotaur Set: Conspiracy: Take the CrownSet: Commander 2017 Type: Legendary Creature Cat Warrior Rarity: Mythic Cost: {1}{G}{W} First strike Whenever Mirri, Weatherlight Duelist attacks, each opponent can't block with more than one creature this combat. As long as Mirri, Weatherlight Duelist is tapped, no more than one creature can attack you each combat.