Sure, you want to save vampires to come onto the battlefield for free when Strefan, Maurer Progenitor attacks, but casting vampire spells with Bloodlord of Vaasgoth on the field can be a good way to buff your vampire army mid-game
They may not like having this dropped on them at first, but just wait
from the comfort, safety, and convenience of their homes via Remote Duels
Shaddoll's weak point is that it's a shame that many decks are not good at activating effects during Dimensional Fissureor Macro Cosmos
Its likely the cant be blocked by white creatures text wont be relevant too often, but there may be times it can get through some white blockers to finish off a planeswalker or maybe even a game
Its ability to add extra Energy speeds up how quickly a Pokmon can attack and sometimes lets players strike with a heavy hitter before the opponent can react