Grogg

Grogg is an alien from the Blackthorne portion of the Generation 1 continuity family.

What have I got in my pocket?

Grogg has guarded the library planet of Andellor and the Prism of Power for a millennium. Waiting at the end of a gauntlet of worm creatures and tentacled beasts, Grogg confronts knowledge seekers with a fiendishly difficult riddle. If they can answer the riddle, they are allowed use of the Prism of Power for 48 hours.

{{#if:Grogg's riddleTransformers in 3-D #2|

“	It cannot be touched, tasted, seen, or heard; it might not exist at all, except that its strength has laid low the greatest titans. All live under its reign, and eventually fleshling, Autobot, and Decepticon will all fall before its just hand. What is this?	”
{{#if:Grogg's riddle| —Grogg's riddle{{#if:Transformers in 3-D #2|, Transformers in 3-D #2}} }} }}

Fiction

Transformers in 3-D

In search of the Prism, Ironhide, Cosmos and a group of children approached Grogg. He explained to them the terms of his riddle, making it clear that if they failed, they would become worm food. Fon answered the riddle correctly ("time"), and Grogg was happy that finally someone had managed it. He insisted on keeping Fon for the 48 hours until the others returned with the Prism. The other children reluctantly agreed.

After the Prism was used on S.S. Exton 9, Cosmos departed to return it to Grogg and retrieve Fon. Transformers in 3-D #2