This is how Unicron sends Thunderwing to Volcano Island goes in My Little Pony Transformers Prime: Battle for Volcano Island.
[We see Unicron standing surrounded by clouds of Dark Energon]
Unicron: Hmm. Thunderwing!
[Thunderwing appears and bows]
Thunderwing: Yes, Lord Unicron?
Unicron: Go to that island and corrupt its inhabitants with this ooze. [hands him a jar full of Dark Energon ooze]
Thunderwing: As you wish, my master.
[Thunderwing furls his wings and flies away]