Neheb players are rioting
One way that players answer a Merciless Eviction is to sacrifice their team to something like Viscera Seer or Goblin Bombardment and then they just recur their stuff later, but now if they do that they'll just get exiled from the graveyard as well on resolution
7 Deadeye Navigator Deadeye Navigator is a powerhouse, and definitely an important part of any list of the best blink cards in MTG
Creatures that work well with this artifact include Griselbrand / Emrakul, the Aeons Torn / and Jodah, the Unifier
Thats going to result in 2 (Leonins power) + 1 (Defiant Strike) + 4 (both magecraft triggers) for the Defiant Strike
Sure, copying spells isn't exactly brand-new tech, but getting copies of creature spells on the stack is relatively newer space, and the fact that Volo has a built-in "drawback" to achieve that - you have to spread your creature types around to get the value - pushes deck-building away from the usual suite of 40 value staples and forces deck-builders to go a little deeper into the tank