Illaoi not getting assists with her tentacle damage. [GAMEPLAY]

When playing Illaoi top I had my quinn come gank gnar twice. Used my E to grab spirit and did enough damage to it to activate the secondary effect. The E did a large amount of damage then the spawned Tentacles from the effect did more. Quinn got the killing blow both times and I didn't get an assist either time. The damage from the E and the damage from the Tentacles were right before Gnar died. Also, the Quinn was able to secure the kills because of the slow after the E activated when I killed the spirit.