V2 means nice XP and great drops (items worth up to 100k at the Trade Vendor).

The Big Room got Big Spiders & a very fast respawn rate.

The Red Room got less mobs, but a good respawn rate.

The first few rooms got Snake Archers, Snake Swordmen, Scropion Archers, Scropion Swordmen, and Little Spiders.

As you advance, you will find big spiders that begin to spawn.

NOTE: Some rooms cannot be accessed.