I feel like if this was a basic and the attack cost was a DCE for less damage, this would definitely see play (although rayquaza Guardians Rising had a similar attack that doesn't see much play at all for some reason). I think this card is really cool and has a really useful ability but it's just on the very very edge of being a competitive card but hopefully I'm wrong.
Side note: the sleeves look amazing
Just wait, im sure they wouldnt include silvally without his signature items. especially when i thought this set is gunna revolve around silvally as one of the main pokemon