Looking back at the older Pokemon TCG generations brings back plenty of nostalgia from the first few generations, when things were simple, and there was no such thing as the Fairy type
If your opponent casts Murder on one of your creatures, you either prevent it from happening or get to do it to one of their creatures
Its a simple but very effective ability, and you can upgrade it by making sure all of your bits are indestructible or currently being flickered out or whatever you want to do to make sure this never harms you or your stuff
You could lean far heavier into burn effects with cards like Guttersnipe and Fiery Emancipation to tear through your opponents life totals
However, she needs to be brought in against other control decks because denying your opponent card draw is a significant asset
Time has shown that the "can't block" drawback leads to better gameplay, so we've started using it on red as much as black