The token doesn't copy whether Stormsplitter is tapped or untapped, whether it has any counters on it or Auras and Equipment attached to it, or any non-copy effects that have changed its power, toughness, types, color, and so on
Now that we are well underway into the Mega Evolution era, it's worthwhile taking a look back at the base set that started the era
They can be made better with synergies and the like but mostly they feel much more like a cycling card with a means to mitigate the tempo setback of such things
Then, play up to 1 [Zou] from your hand
And heres what it does: At quick effect speed, you can detach a material from this card to negate the activation of a monster effect, and if you do destroy that monster