This was always going to be a financially impactful set, given how well its been selling on pre-order despite massively inflated prices
Its a heavily supported element of Magic thanks to flicker effects and ability doublers
A lot of people I know gripe about this card because it costs five mana and not four like Grave Pact but for one extra mana you're paying for an easier casting cost and this nice little thing called FLASH
Now, not every Boros deck can run this one, given the coven trigger requires you to have a variety of powers on creatures and have a few creatures in play but it can be an incredible four-drop to slam down early and start accruing value with
This is because Leafeon ex's all-important Ability, Forest Breath, allows you to hook one Grass Energy to one of your Pokemon per turn, so long as it's in the Active Spot
Wild Ride also works, using Vivis mana to harmonize it