Mephisto gets1 month to do nothing but watch his victims (they are completely unaware of this) and take note of their mental strengths, weaknesses, habits, desires, ect, ect...
After the month is up, he aggressively attempts to get his targets to willingly give up their souls...
NO PIS ALLOWED; nor is this a gauntlet...
Who, on the following list, is Mephisto able to convince? Who is able to resist "Satans" charms?
1) Bane...
2) Wolverine...
3) The Enchantress...
4) Tony Stark...
5) Sinestro...
6) Hank Henshaw (lets just assume he has a soul for now)...
7) Darkseid...
8) Terrax...
9) The Punisher...
10) Magneto...
Bane: Probably not
Wolverine: No
The Enchantress: No idea
Tony Stark: Yes
Sinestro: Probably
Hank Henshaw: Yes
Darkseid: No
Terrax: Yes
The Punisher: Shoots Mephisto in the nuts!
Magneto: Disrupts Mephistos`core and becomes ruler of his realm.