It's a game-ender, typically sweeping away your opponent's entire board, while preserving any colorless permanents you've chosen to play, and, more often than not, also leaving Ugin alive to keep pecking away with their +2 damage-dealing power
The fact that it costs eight mana also hardly seems like a concern, given how easily green can pull ahead of other colors with land ramp and mana dorks
If youve played any Final Fantasy game, or even any RPG, youre like, Yep, theres the weapons vendor, the item person, theres the person greeting you when you come into town. Many of the most recognizable heroes, like Cloud and Sephiroth, are reserved for the rare and mythic rarity character cards, which are intentionally powerful, yet the latter of which show up only in one of every eight packs of cards
For an investment of four mana you net an on-curve 4/4 flying with a discard ward