It's likely that the spike is being driven by the Boros Convoke deck played in Pioneer and Standard, which just got a big boost thanks to a common card printed in Murders of Karlov Manor
There is a real case for Yuna's high degree of open utility here, so make of that what you will
Monstrous Vortex Monstrous Vortex is a great green enchantment, much like the multi-format banned Up the Beanstalk
McDonalds UK, Ireland, Austria and Germany are ahead of the rest of world in releasing the Pokemon cards first but there are a number of countries around the world including Canada slated to get these very soon
Flash is a huge boon here, making it more likely you at least get the first trigger, while also playing into some of the transform mechanics on werewolves
Signed Japanese First Edition Base Set Holo Charizard 8