Wilds of Eldraine doesnt seem to include must-ban outliers on the level of Once Upon A Time or Oko, Thief of Crowns but it does include Eldraines powerful signature mechanic: adventures
As a note for how things are going this time around, I'm not taking my past approach of tackling every single common in Masters/Horizons sets
However, as Luna and Leo were taken by Trudge to the controller where Devack was, she was instead transported back to the Minus World in order to free Ancient Fairy Dragon
Upon entering the battlefield, you get to have it deal damage equal to the number of lands you control to any number of creatures or planeswalkers your opponents control, so likely around 8-ish assuming you hard cast it
Its owner will control the creature, and it will remain on the battlefield even if you leave the game (if you don't own it).
In particular, you might want to run a fair number of Sagas, which count as historic permanents