Hades frees the Titans/The clash of the Titans

This is how Twilight revives Thunderwing goes in Thunderwing's Revenge.

[We see Luna, Ratchet and Starlight groundbridge to the cooridinates of their final battle with Thunderwing]

Starlight Glimmer: Did Twilight do this?

Princess Luna: I fear Thunderwing's mind is dominant, and clearly he came here for one purpose -- To use the Dark Energon to resurrect his own body.

[Princess Luna, Ratchet, and Starlight then see Twilight using her magic to pull Thunderwing's corpse out of the ocean and attach one end of a patch to his head and the other end to her horn]

Starlight Glimmer: Ratchet, don't hurt Twilight.

Ratchet: That isn't Twilight.

Princess Luna: That's Thunderwing.

Starlight Glimmer: No. It's Twilight. I'm sure.

[Twilight swats away Ratchet and Princess Luna]

Starlight Glimmer: Hey. Twilight, you have to fight it!

Twilight Sparkle: Starlight, is that you?

Starlight Glimmer: Yeah, Twilight. It's me.

Thunderwing: [in Twilight's mind] Unbelievable!

[Twilight holds her head in pain and collaspes]

Starlight Glimmer: Twilight!

Twilight Sparkle: [with Thunderwing's voice] Twilight can't hear you anymore.

Starlight Glimmer: You get out of my teacher's body!

[Twilight shoves the Dark Energon shard into Thunderwing, reviving him. Thunderwing's red eyes snap open]

Thunderwing: The follower of Unicron has