Path of Exile and Swords to Plowshares are there are instant-speed answers, but they seem insufficient to delay the armies of players that don't want to stare down a Silent Arbiter
Plus, hes a Werewolf on the backside, and although most payoffs are in red and green, thats still a popular creature type
Combined with land cards that can let you fill your graveyard, this is sure to be a powerhouse
Stage 2 decks, which are likely to become more popular as powerful Pokmon ex are printed, benefit greatly from having a way to search for Rare Candy, and Arven could be that
Chatterfangs ability can be used to remove problematic creatures with smaller amounts of Toughness like Grand Abolisher
The deck is very well positioned, it combines an aggressive game plan with versatile tools and is overall a top tier contender when fighting for meta game share and results