That creature becomes a copy of the card with the chosen name until Killer Cosplay becomes unattached from it. This allows you to turn a common card into a mythic rare, but you do need to know a fair bit about Magic: The Gathering to be able to pick the right creature for the situation
From my initial predictions, I was also able to predict Sephiroth having something like a wrath mechanic , which Sephiroth, Planet's Heir kind of does by debuffing all your opponents' creatures, potentially wiping out large swaths of weak token creatures
What if you are able to create three or four copies
best hand traps is one of the most powerful and versatile negate cards in Yu-Gi-Oh
You can brutally hard counter artifact synergies with your maindeck Shatterstorm and so forth
Single Pokmon Cards Are Crashing In my opinion, this is a strong two-for-one situation