Twelve loyalty is so much, even with all your planeswalkers proliferating, and picking them off to take the extra turns weakens your board since your superfriends deck ostensibly wants those extra turns to activate its planeswalkers again
Well, three-mana 2/3s are exactly what the defensive decks want to help shut down any early aggression and bridge to your mid-game grindy plans, and thats a hard role to fill in blue
One of the best ways to prove a card is the first one you drew is to keep it separate from your hand , either put your hand down or keep the card near your library
Youre looking for a lot of the same support youd want in a Phenax, God of Deception or Doran, the Siege Tower deck: things like Nyx-Fleece Ram or Caelorna, Coral Tyrant
The rarity of these effects indicates the power of shroud
This is the best all round value, defense, answer, stall card you can play