A Curse Idol was afflicted with a Curse of Vulnerability and had an Ancient Statue in hand. Spark revealed the Ancient Statue, which triggered and reduced damage. It then took the 2 remaining damage (marked in the log as 'electrical damage') despite the immunity it should have. Not 100% sure if this is an error in how it is presented in the log (extra damage from Curse of Vulnerability is untyped, and therefore not prevented) or in actual mechanics (extra damage is of the same type as the source, and therefore should be prevented by immunity).
This is the same bug, isn't it?: http://forums.cardhunter.com/threads/bug-ancient-statue-does-not-have-electrical-immunity.7075/ Maybe this bug will have been fixed by tomorrow, with EttSC release.
It will be. Spoiler Gethen Deathzap shoots a deadly spark Gethen Deathzap inducts sparks Barrier of Hate failed! Ancient Statue reduced damage to Idol Trett by 6. Idol Trett took 0 Electrical damage.