Spirit shields all require 75 Defence (with the exception of the Blessed spirit shield which requires 70 Defence) and have Magic and Prayer requirements depending on the type of sigil attached. The Arcane and Spectral spirit shields require 70 Prayer and 65 Magic, while Divine and Elysian spirit shields require only 75 Prayer, however membership is required in order the use the latter.
When a player casts the abyssal whip special attack on a spirit shield, it disables the effect temporarily. (50 Hits)
The Spirit Shield can be obtained by talking to Horvik, who's located west of Varrock Centre.