Thor needs a powerup to fight his old man
Thor and Odin get into an old fashioned family feud. The living tribunal is bored and wants to see a good fight. How many times does he have to amp Thor's power to make it an even match.
Scenario 1--Thor gets amped but nothing to do with Mjolnir gets amped, no Godforce amping.
Scenario 2--Thor and trusty hammer both get amped equally, no Godforce amping.
Let's assume he does not get his belt or guantlets or warrior madness.
On a side note, would an amped godforce attack be able to be used against Odin? Or does it not work on him?