Through a layer of illusory mirrors and flames, Duncan could still clearly observe the reactions of Tyrion and Lucricia from beginning to end—tension, vigilance, and a faint trace of fear.
From the perspective of a "family reunion," this atmosphere was far from ideal.
But he didn't mind, as this situation was expected—Having the chance to meet Tyrion in circumstances under his control was already the goal of the day; laying a foundation now might avoid panic during a sudden encounter later on, and what's more... today was a "buy one get one free" situation.
He hadn't expected Lucricia to be there, too.
And just now, hidden within the mirror, he also heard the exchange between Lucricia and Tyrion, knowing that his last attempt to call the latter through "Niru" was not without effect. Although he hadn't received any feedback on his side, there was some movement on Lucricia's end, which counted as an unexpected gain of intel.