Target creature cant attack until your next turn This is fairly similar to (and even more defensive than) the Lost Mine of Phandelvers Fungi Cavern
Im confident that the proper sideboard can be constructed to make a mockery of attempts to contain the unfair elements of Izzet Phoenix, easily dancing around Force of Negation or Surgical Extraction or any other card-disadvantageous hate that halts the terrifying nut draw
In Commander, Rowan is better in some ways as the Commander since life lost this turn is easier to pay for free with things like Phyrexian mana costs or cycling Street Wraith
Attaching can happen before blocking and potentially gain you life, give your creature Double Strike, or just boost your board if Equipped to a creature that gives bonuses for all Equipment
See why River Song is my top scoring Commander from this set
So then, Soul-Guide LanternSoul-Guide Lantern and Skrelv, Defector MiteSkrelv, Defector Mite