1. Add "Game Options, Wild Surge Keys, 1" to baldur.ini for BGII:EE.
2. Load the attached save game in BGII:EE SoA.
3. Ctrl-H until you have Surge Number 1 selected.
4. Have Player1 cast Shield.
You get "Wild Surge: Wild color changes."
You get the effect "Repulsion field centered on the caster."
This is according to the Wild Surge table on page 206 of the BGII:EE manual "Mastering Melee & Magic."
Currently Wild Surge 1 is the same as 2.