Kiki-Jiki, Mirror Breaker

If another creature becomes a copy of, or enters the battlefield as a copy of, the token, that creature will copy the creature card the token is copying, except it will also have haste. However, you won't sacrifice the new copy at the beginning of the next end step.

If a copied creature is a token that isn't a copy of something else, the copy copies the original characteristics of that token as stated by the effect that created it.

If the copied creature has {X} in its mana cost, X is 0.