Playing on Windows 10.
I have a Valkyrie Scout fused with a Unicorn Vivifier, using an artifact with Haunting Memories on it. I thought I could get the dead Scout to possibly revive itself with it, but after tens of hours, I haven’t seen the attack trigger a single time.
The problem with Memento Mori is that even though it triggers, it does 0 damage most of the time, and extremely little damage the rest of the time.
I have an Apis Defender fused with an Enclave Amaranth. I took some screenshots to show that the high defense Apis Defender is attacked, takes damage, triggers Memento Mori, but does 0 damage to the low defense Centaur Runner. Now this one enemy turned out to have Life Strength on its artifact after I started taking the screenshots, but I experienced the same thing on multiple enemies that didn’t have that, and across multiple realms.
Other traits in my team are: Urh Harbinger, Supersonic, Celestial Fortitude, Jailbreak, Fool’s Axiom, Endurance Aura, Anomaly, Infusion, Exalted Detriment.
The reason I think something’s wrong is that even though I use Anomaly, my Valkyrie Scout does good damage thanks to Exalted Detriment, which, like Memento Mori, is based on a percentage of defense.