Extortion

When Ratchet stumbles upon a relic while searching for energon, it doesn't take long for him to realize that Megatron wants it for his own possession.

Neither of them expected the relic to transfer its contents to Ratchet during the struggle to claim it.

Now that the relic itself is useless, Megatron sees an opportunity to kill two birds with one stone.

But if Ratchet doesn't give Megatron the information he desires, his physical wellbeing won't be the only thing he has to worry about.

(This does have some depictions of violence and such, so read with caution.)