Muldrotha is in Sultai (black/green/blue) colors, giving you access to easy ramp, counterspells, and removal
But once Henzie hits the battlefield, opponents are encouraged to keep it there
Firstly, if you discover a spell you dont want to cast, you can put it into your hand
In all seriousness, though, a panic button available to any deck is something to be wary of, and its appreciated that designers were mindful to limit the potential for annoying scenarios by making this legendary and having it exile itself on activation
I have picked 5 cards from 6 different Wizards of the Coast sets and analysed the prices realised between September 2017 and December 2017 below to look into this further
Where Oops! was once considered fringe and even appreciated for its novelty, the addition of MDFC lands provided a terrifying boost in consistency and power