the first lich mastery support cast by an opponent did not deal its damage when destroyed.
The second lich mastery that will be destroyed deals its damage.
My own first lich mastery deals the damage when destroyed by the opponent.
Naabaldan
I’ve noticed this as well. Really the second cast should stack on the first without changing the shield count. Allowing two to be on the board is a bit OP.
I tried a while with LM. It feels like: my own LM deal dam. every time and opponent never. Okay sometimes it damage, but you can’t settle on that. So I don’t use it, but hate it if matched against.