We cant quite determine what theyre doing, but they seem to be doing it quite well. Vedalken research notes Watermark: Mirran Illustrated by Greg Staples Standard Not Legal Alchemy Not Legal Pioneer Not Legal Historic Not Legal Modern Legal Brawl Not Legal Legacy Legal Comp
Discarding cards is something that always sounds good but often plays out really poorly
However, even with just one opponent, that player will draw four cards, so that ends up being a total net loss of one card for you, which means Prosperity with X=4 was not card advantage
This isn't an attack that can be used every turn, but if the opponent is also relying on powerful, high-HP Pokmon, Charizard ex can deal with any of them in only one attack
4/4 Illustrated by Volkan Baa Not Legal This version of this card is oversized with a non-standard Magic back
Wheel of Fate costs only two mana to suspend it with four time counters, putting a clock on your opponents cards