Works really well in conjunction with Fastbond and Lotus Cobra. Lotus cobra also allows you to hit the 4 colors necessary for it. It does kill almost all relevant PW's/Dudes used in vintage. Could be interesting. Sidenote, it also is an elemental, which maybe advantageous in some of the elemental decks I believe you, Chubby, have tried before.
Set has been spoiled and this card appears to be the early chase mythic with multi-format implications. It replaces itself with the triggered ability, can fuel an incredibly potent card draw engine with Sylvan library (trigger landfall on your and your opponent's turn to draw the extra two), pitches to the three relevant Force of Wills, and has other potential with the mana generation and planeswalker sweeping ability. I am curious what shells people can imagine for the card in Vintage.
Dragon is correct under the standard definition of strictly better you must have all of the same upsides with either additional purely positive abilities or better stats. For example if tomorrow they printed a Thalia guardian of Thraben that did not have first strike but was a 7/7 it would not be strictly better. It would be vastly better yes but strictly better is like ancestral vs jace’s ingenuity not like necropotence v greed.
I understand what you're saying, but the maindeckability of this card is far better because it still does things vs. the Bazaar decks while being leaps and bounds better vs. blue.