This card was introduced with the Tarkir: Dragonstorm set that released this year in April, and it immediately saw play in various formats because of its strong, arguably overpowered effects
Whats better, another ritual banned in powered formats, or another insane five-drop Dragon that dominated Standard
That said, in order to fight you need Energy cards
Not only does the pair pack solid base stats, it also draws a card when it enters play and attacks, with the option to discard lands as well to remove problem creatures
The extreme scarcity of this card has turned it into a chase within the collecting community, as pull rates are notoriously brutal and require opening multiple cases of booster boxes to find a single copy
It's no wonder this is the most popular option on EDHREC from the set so far, and as a Monowhite card, no less