I do not recall any environmental effects which would have interacted with the spell, but I may have missed them.
Is there a quick reference in the game menus which will tell you which spells/skills will interact with which environmental effects? The Electric Discharge spell description doesn't mention environmental interaction. Being new to the Divinity series, I didn't find it intuitive to suspect that this spell would interact with blood, for example.
Most people miss the blood. You see a character take damage, see the blood effect, don't think much about it since it's not crazy obvious like the other fields and it can get pretty crazy in its spread patterns (ONE TINY SPEC OF BLOOD YOU DIDN"T SEE AND BAM, YOU STUNNED YOUR BUDDY TOO).
Sometimes I feel like a CSI team investigating the battlefield before I decide to make use of blood for whatever reason.
