Pikachus original design wasnt the slim one we know today
It takes very little effort to untap with six mana on your third turn all you have to do is play three Forests in a row
She can also destroy a card on your opponents field or in their hand whenever a monster leaves the field by the effect of a normal trap card
Would you consider adding any historic PSA 1 to your collection
Excruciator being a compact way to add another angle of attack fits perfectly into a midrange strategy, which relies on being able to adapt its plans against various opponents, as opposed to a controlling strategy, which is much more concerned with the ability to answer incoming threats than finding win conditions
Whether its your precious planeswalker, my combo piece, or someones best creature, this turns into the best card for the situation because it has so many potential targets