For she will turn any creature into a Vampire (and makes it a bit more powerful in the process by giving it a +1/+1 counter), and for she gains control of target Vampire
The nice thing is this is pretty easy to trigger and should be doing so off of things you already want to be doing like removing their creatures, sacrificing your own for value, casting spells with warp, etc, so it doesn't require much of a build around and as such is a simple ask to include in your deck
PSA is best for resale value CGC is best for accuracy Beckett is best for strict grading The right choice depends on your collecting strategy and goals
However, it takes too long to set up and only does 80 damage for three Energy
Sandile a crocodile of the desert who does not like water
At any rate, no collector in their right mind would turn down a PSA 10 card from the OG glory days of the Pokmon TCG