Drake's LotV Review/Recap [SPOILERIFFIC]

[ragnarok]

Exactly all life , and only protoss and zerg are exclusive change by Amon

Which made it another retcon problem. Now even the terran race is being subjected to this BS.

[Turalyon]

Replaying the game on hard... I hate to admit it, but it does kinda make sense why Kerrigan could become a Xel'naga on her own.

Artanis is reading the shrine, and specifically identifies what purify of essence and form means; essence means spirit, capable of great change, while form means great psionic potential. This actually makes total sense with why the Zerg in SC1 were so obsessed with finding and infesting Ghosts, and with Kerrigan being one of the most powerful Terran psychics there is and infested on a deeper level than any other Terran, presumably, she fills the "great psionic potential" bit without needing the protoss.

Purity of essence and purity of form never specifically meant the protoss and zerg: they're just the best candidates.

If the purities are defined as such, then how come Kerrigan isn't immediately a Xel'Naga when she became infested by Swarm Zerg in Sc1 nor when infested again by Primal Zerg in HotS? You could say the Swarm Zerg had no purity of essence with the retcons in Sc2, but if the Primal Zerg had the purity of essence and Kerrigan had purity of form (defined here as massive psionic potential), she shouldn't need Ouros' power to be a Xel'Naga.

[ragnarok]

If the purities are defined as such, then how come Kerrigan isn't immediately a Xel'Naga when she became infested by Swarm Zerg in Sc1 nor when infested again by Primal Zerg in HotS? You could say the Swarm Zerg had no purity of essence with the retcons in Sc2, but if the Primal Zerg had the purity of essence and Kerrigan had purity of form (defined here as massive psionic potential), she shouldn't need Ouros' power to be a Xel'Naga.

Because in SC1, this was done via the corrupted Zerg. They were no longer pure because of Amon's taint. This was explained by Zurvan in HotS that because they weren't bound to the Overmind, they remained pure.

As for what happened in HotS, just purify of form and essence alone doesn't make you a Xel'Naga. Even with them combined, you still need the Xel'Naga's help in some way.