ugin mtg card Ugin, the Spirit Dragon [Mythic Edition] From the Fate Reforged set. This was my first thought

Mana, Ramp, and Lands Since Errant and Giada cost three, there are few common ways in Azorius that will drop them in turn 2, like Birds of Paradise

The Headless Horseman is, unfortunately, a boring vanilla creature

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You dont want to be playing to a battlefield where you have five lands and they have big threats

Given how important oil counters seem in the set, I think we've got a sleeper on our hands here