As much as he dislikes the sight of the Imperiused men, the sudden loss of their spell does not speak good things either. His stomach drops, knowing that it means Gellert must be seriously affected by the curse's influence. Albus glances at Li briefly, seeing her better now that she was in the water and fed.

He casts another spell, this one a barrier on the shore itself, before undoing the one on himself and Li, freeing them both. The new spell isn't a shield meant to last forever, but it should last long enough for the men to gather themselves and leave the lake.

And with that, he Apparates away, leaving Li to swim freely while he returns to Gellert's side. With the Elder Wand in hand, he immediately moves towards where Gellert is shaking and growing paler, looking him over to see how the curse is affecting him.