If Polyraptor leaves the battlefield before its triggered ability resolves, most likely because it was dealt lethal damage, the token will still enter the battlefield as a copy of Polyraptor, using Polyraptor's copiable values from when it was last on the battlefield
Cards from un-sets and the Reserved List are excluded
Should there be a bracket 3.5, 2.5, or something between the existing brackets
Enchantments like Spreading Seas are great since they stick around and require removing
If the spell that's copied has an X whose value was determined as it was cast, the copy has the same value of X
If Im honest, they feel a little uninspired, but its nice that the option is there for hardcore fans or those who want to try a very specific kind of build