Decks I faced vs serp:
- Spiritual pillar deck (centered around Reaper which is illegal)
- Envenom + Scorpion Claws (was illegal because it was gully upped, but it looked dangerous)
- Shell of void + give + Byakko (beat it with Deployer + SoPa)
I used the DBH/fate egg (I'd drop standalone eggs and add more quanta) deck and Deployer + SoPa