Go Blank used to be an incredibly strong card against Izzet Phoenix, countering the milling of Pieces of the Puzzle and making it so casting Treasure Cruise was almost impossible
He has a triggered ability: whenever you cast a noncreature spell you place a +1/+1 counter on Vivi, and it deals one damage to each opponent
At the beginning of each end step, if all lands on the battlefield are Islands, remove all flood counters from them
That however leaves the deck a little unfocused with a planeswalker that does nothing to help you put cards in the bin
The only downside is that its tougher to mix Mixes in multiple element strategies
But it plays relatively smooth once youve learned the nuances, like knowing what all of your possible targets are for tutor spells Crop Rotation and Mystical Teachings, and making sure you have enough mana-fixing elements to produce all of the colors you need