I think more than anything, its the ability to negate any varieties of Heroic Intervention that get thrown out in response
The only real merit of this card is the quirky combos you can do with it
Third Place Teferi, Time Raveler Andrea Piemonti The double-edged swords (Sword of Fire and Ice, Sword of Feast and Famine, etc.) are the best cards in UWx Control decks and the best card against them, is this 3 mana Planeswalker
You make a land that counts as every basic land type, so it taps for everything
Although the abilitys cost is high, you can transform Elesh Norn into a potent Saga that will likely destroy your opponent
The Talonflame Illustration Rare, for example, gives us a birds-eye view over the rooftops of Lumiose City, with shadings of morning light and shadows dappling the buildings