Mordenkainen's Defense Against Nonmagical Reptiles and Amphibians

A creature protected by this spell gains an advantage in combat with non-magical reptiles or amphibians, including snakes, dinosaurs, frogs, and giant-sized species of such animals. Dragons are excluded from the spell's effect, as are other creatures with unnatural abilities. All affected animals have a -2 penalty to hit the protected creature, and the creature gains a +4 bonus to saving throws against reptile or amphibian venom.

The material components are a bit of snake skin and a dried frog's leg placed in a pouch of hardened leather.

Notes: Uncommon or rare spell (WoG).