I, personally, find this theory less convincing and accurate than the first mentioned, but both lead to the same ordering
Season of Growth's last ability resolves before the spell that caused it to trigger
For example, There // They're // Their has a mana value of 6 while it's in your library
Vivi Ornitier Is The Black Mage Who Broke A Meta The most recent entry on the ban list, as of the time of writing, was pegged for restriction as soon as it was announced
It only happens once a turn but can give you double the activations on your abilities, which is pretty darn good given the number of Elves that produce mana
Realm-Scorcher Hellkite Realm-Scorcher Hellkite is a strong 6-drop dragon, allowing you to have a 4/6 with haste that, if bargained, produces 4 mana