Forget about Tarantulas!   The original "spawn of Unicron" was Galvatron!  Who could forget the classic scene from Transformers: the Movie where the weakened and heavily battle damaged Megatron, attempts to "negotiate" with the all powerful Unicron!  If you thought the oracle 'reformatting' of BW characters into 'techno-organic 'beast machines was cool, you had to love the original reformatting!

 

Allegiance:  Decepticon

Function: Decepticon 
(Leader) City Commander

First Comic Appearance:
Transformers: The Movie #1

"My power is everything; defeat is absurd!"

more pictures:
Galvatron -toy, robot mode
Galvatron -toy, cannon mode
Galvatron -toy, cannon mode2

Profile: Galvatron is the new name and identity for Megatron when his remains are metamorphosized by Unicron.  Galvatron is Megatron to the ultimate degree, more evil, more powerful, and even  less subject to emotion or decency.  Through the powers of Unicron, Galvatron's own powers are augmented continuously so that his strength becomes so vast that his arrogance and confidence are boundless. As long as Unicron exists, Galvatron is invincible, but Galvatron's conceit and greed for dominance are so great he even plots against Unicron and hopes to retain his new might without him. 

Abilities: He possesses enough strength to pulverize an Autobot into scrap metal. In robot mode, he carries a laser that emits chemically- produced, direct-current electricity.  W/ Unicron at full strength and as an ally, Galvatron's cannon mode possesses more firepower than any other Transformer in Cybertron's history!

Weaknesses: Prior to the fall of Unicron, Galvatron was invincible, limited only by the sheer will of Unicron.  After the events of the movie, Galvatron's cerebral circuitry became severely damaged, making him a deranged psychotic Decepticon leader.

Other appearances:  Galvatron was mentioned in the Beast Wars episode: "Possession" when Blackarachnia was confronting Starscream with his 'half-truth/ half-lie about Unicron having destroyed him. 

Galvatron was also the leader of the "Beast Wars 2" Predacons in Japan.  An awesome triple-changing toy, that converted from robot, to drill tank, to dragon!  

The next Galvatron figure came in 2003 a recolored version of Armada Megatron.  Followed by another Meg recolor in 2004, TF: Energon Galvatron.