Upon being subjected to his upgraded Domain, I could honestly say that this Thunderous Tempest was quite nasty.
Even if it only reduced Endurance unlike the Graveyard of Blades, the impossibility to dodge against the purple lightning was more annoying. The Domain was like a makeshift oven that would cook you up like a pig. Stay too long and you'll be roasted.
Alone, it could decimate a group of Transcendents. As long as they're not strong enough to resist its effect, they essentially would have lost right there and then.
Luckily for me, it's something my body could handle. Moreover, knowing that he deployed it in order to dodge a clear hit from me, I was quite proud to have bested him at this moment.
"This is amazing, dad. But let me try this out too."
As I retreated for a moment and once again, I activated both Energy Storm and Legendary Support Domain.
Then, the same as earlier, I merged the two into one, creating a pseudo-upgraded Domain.