There's a previous thread which centers around the infinity gauntlet that has a few attempts at creating Thanos, Warlock etc. Maybe a new thread should be started if we are going to try for other cosmic beings aside from Galactus?

Personally, I like Thanos even more than Galactus. This is the only way I'd make him...

Thanos, Mad Titan
Cost 8
Team: Unaffiliated
ATK: 20
DEF: 20
Flight: No
Range: Yes
As an additional cost to recruit Thanos, KO two characters you control.
Thanos cannot be KO'd.
"Thanos has been forever banned from Death's domain."

I'll make one, so we can discuss.