In isolation it will often feel quite good (Selesnya Tokens, anyone?) It will sometimes be worse than Ritual of Soot
Litten takes 20 additional damage from Water-type attacks
Between protection from blue and black, both of which have decent creature removal in different forms, and the card advantage of the on-damage ability, there isnt much this Sword leaves you wanting
The end of the trailer teased an Immersive Card that featured Mewtwo
Spirits decks tend to flood out in Modern and Pioneer, so having a way to churn through cards is a great addition.
I will start with the betas, the alphas, and then the coveted packleader, my pick for best Werewolf card from the set: The Betas First are the cards that I'll happily run in a lower budget version of the deck: they fit nicely with the deck's game plan of beating our opponents into submission with combat damage, either by coming down early to start drawing cards off Tovolar, Dire Overlord, or providing some nice utility to our tribe