Jörmungandr and Apep 1-2
They Both
- try to/or destroy creation
- where not worshipped but feared.
- Are great(huge) serpents.(although in some stories Apep is portrayed as a crocodile)
- Both are believed to be the reason for earthquakes.
- Both are considered evil
An added plus is that really big serpents will look great in a cardgame!