4 Ball Lightnings, 1 Vulture, in that order. Vulture should have Scavenger activate 4 times before he attacks, thus I should do 24 damage this turn.
But I only do 23 damage. ???
It appears as though the death effect and/or the scavenger ability is not getting activated until after the Vulture has attacked. I do not know whether the creature positions are important, though I will try to test in trainer to find out.
EDIT: After testing in the trainer, I found that I could only replicate the bug vs Turtle Shield. But in that scenario, it happens every time.
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52k 52k 52k 52k 52k 52k 808 808 808 808 808 808 809 809 809 809 809 809 80i 80i 80i 80i 80i 80i 81q 81q 81q 81q 81q 81q 8pk
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7q0 7q0 7q0 7q0 7q0 7q0 7q0 7q0 7q0 7q0 7q0 7q0 7q3 7q3 7q3 7q3 7q3 7q3 7q5 7q5 7q5 7q5 7q5 7q5 7qb 7qb 7qb 7qb 7qb 7qb 8ps
This should do 64 dmg.
Instead, it does 61. You can see that the first Vulture isn't delayed...because he never attacked despite having a BL die in creature slot 1. You can also see that Vulture #3 only did 9 dmg, despite having 10 atk.