Ryvura

This is how The Overlord reveals himself as the leader of the Sons of Garmadon goes in Game of Masks.

Twilight Sparkle: Who was that guy?

Killow: Oh, that's right. You haven't been formally introduced to our leader. Boss, come say hi to the kids.

Applejack:

[

Mr. E: After we were, we needed ???? to ????. Luckily, we found a ???? who ????. Say hello to our ????, ????, and ????, the Quiet One.

Applejack: Why'd he wearing a helmet?

[The Quiet One takes off his helmet and reveals himself as the Overlord with disfigured scars on the right side of his face]

Applejack: Ugh.

Rarity:

Ultra Violet: Man, we have got to get you into a dermatologist.

[The Overlord looks at her and back at the heroes]

Twilight Sparkle:

The Overlord: You alicorns are no longer the only ones with alicorn magic.

Killow: The Overlord agreed to ???? ???? so long as we shared ????.

Mr. E: He implants every type of magic to make himself more powerful.