Protean Raider

If Protean Raider somehow enters the battlefield at the same time as another creature, Protean Raider can't become a copy of that creature. You may choose only a creature that's already on the battlefield.

Protean Raider copies exactly what was printed on the original creature (unless that creature is copying something else or is a token; see below). It doesn't copy whether that creature is tapped or untapped, whether it has any counters on it or Auras attached to it, or any non-copy effects that have changed its power, toughness, types, color, or so on.

If the chosen creature is a token, Protean Raider copies the original characteristics of that token as stated by the effect that created the token. Protean Raider is not a token in this case.

If the chosen creature has {X} in its mana cost, X is considered to be 0.