You serve ancient serpentine mysteries whose coils still encircle the world.
Familiar: You gain a viper familiar. Your effective wizard level for this ability is equal to your druid level. Your druid level stacks with levels from other classes that grant familiars when determining the powers of your familiar.
Slither (Ex): As a free action, you can distend and stretch your body to fit easily through narrow spaces for 1 round. You can move freely through a tight space that would normally require a creature of your size to squeeze through. While slithering, you gain a +2 dodge bonus to Armor Class against attacks of opportunity provoked by your movement and a +2 bonus on CMB and on Escape Artist checks made to escape from a grapple. You can use this ability a number of times per day equal to 3 + your Wisdom modifier.
Venom Immunity (Ex): At 6th level, you gain immunity to poisons from snakes, reptiles, and creatures with the reptilian subtype. At 12th level, you gain immunity to all poisons. This replaces venom immunity.
Domain Spells: 1st—charm animal, 2nd—animal trance, 3rd—poison, 4th—strong jaw, 5th—snakestaff, 6th—charm monster, 7th—animal shapes (reptiles and snakes only), 8th—scintillating pattern, 9th—crushing hand.