You dont know the identity of this NPC until they or someone else reveals it
Ugin is at least the most deflating card of the year, coming down to sweep away all the work you did building a board earlier in the game and likely leaving behind a massive high-loyalty planeswalker to boot
Day of Judgement There was a time when Wizards declared four-mana wraths were too good, likely off the back of Sphinxs Revelation dominating Standard with Supreme Verdict for the time it was legal, and control players had to deal with more conditional board sweepers
Silvan Reveler Thorin, Oakenshield Bard, King of Dale The Queen of Dale Thranduil, the Elvenking The Lonely Mountain Thorin, Mountain-king Bilbo, Thief in the Night The Arkenstone Smaug the Magnificent Bilbo, Luckwearer Wood Elves Riddles in the Dark My Precious Tom, Bert and William An Unexpected Party Forest Mountain Swamp Island