I was playing as Leona, and my teammate was Kalista. I have been trying to score last-hits on Siege Minions so that we can share the gold, but the Unique Passive, Execution was not functioning properly. I could not score any last-hits on minions due to the execution not working properly. This may be a bug due to Kalista's passive or W's Passive.
I think it has to do with Kalista's W passive; that would be my guess anyway.
The passive is designed to credit Kalista for the kill, so if you were to execute a minion that is 'marked' by Kalista's passive, the game considers Kalista as the one who killed it, so Relic Shield doesn't proc.
Although, if memory serves, it still worked fine on minions that didn't get the W mark fully procced (One that you, as the support, attacked, but Kalista never touched)
