Sandwurm Convergence, Nyxbloom Ancient, Nylea's Colossus (I'm mostly naming creatures, huh?) - even Liliana's Mastery is a beating in multiples
But what really kicks it over the top is that middle part of his text box: Whenever an opponent casts a spell, if no mana was spent to cast it, counter that spell. You dont have to worry about an opponent casting a Force of Will while tapped out, or a free Fierce Guardianship or Deadly Rollick
Cards to Play Around Matchup: Blue-Red Delver Blue-Red Delver: Mainboard 1-2 Brazen Borrower 3-4 Daze Blue-Red Delver: Sideboard 1-2 Force of Negation (2 in 75) 0-2 Counterbalance 0-1 Flusterstorm How To Sideboard vs
He was once one of the most-played creatures after getting printed
5/6 Illustrated by Jana Schirmer Standard Not Legal Alchemy Not Legal Pioneer Not Legal Historic Legal Modern Not Legal Brawl Legal Legacy Legal Comp
Originally from M14, it almost certainly prompted his newest creation, appearing from the same field of view