I implore you to continue to look closely, to follow artists, to ask questions, and most importantly, to enjoy the artwork that makes Magic: The Gathering special, and the best game in the world
Rad counters are pretty rad, and while they will work best en-masse, they can still do enough on more pushed cards
Smugglers Share Whites struggles with card draw are infamous at this point
The drawing ability and +3/+3 should be valued at about five mana in blue (compared to Drake Umbra or Illusionary Armor), so the extra mana for a body that sticks around makes this card a great value
Troubles with math
If you team this up with a card like High Perfect Morcant, or your opponent is also playing a Blight deck, then counters can start flying off Moonshadow at a concerning rate