If you've never seen Nadu in action, its ability (revealing the top card of your library whenever one of your creatures becomes a target of a spell or ability, then putting it into play untapped if it's a land or putting it into your hand if it's not, twice each turn for each creature) creates not infinite but sort of functionally infinite loops with an equipment that equips for free, like Skullclamp or Lightning Greaves
But come on, tell me that doesnt look great
In the long game the versatility of counterspells gives reassurance that blue players will not be blown out with the ability to steal the best card of an opponent in midrange battles
I'll note that in contrast to some of the darker planes, Moag was made to be brighter
The original face choice is Sarah Jane Smith, but like the Fourth Doctor shes rather underwhelming, likely to produce a couple clues each turn but not much else
But, most of the times these will redirect Instants, Sorceries, and/or Abilities as opposed to permanents