I played Sharp Tongue and chose Adamant Dr Medico to take the damage. He took the damage, and dealt himself damage, but The Sentinels did not get to draw, play, or use a power. The game did not progress after that. This was also in OblivAeon mode, so maybe that had something to do with it too, idk.

This is copied from the log file:

GameController plays Sharp Tongue.
Created decision [SelectTargets/None D279 Tucker]
Created decision [SelectTarget/None D279-1 Tucker]
WARNING: There was a request for Quicksilver's character card controller, which is null.
WARNING: There was a request for Quicksilver's character card controller, which is null.
Tucker: Moondancer initiates 1 Sonic damage to Adamant Dr. Medico.
WARNING: There was a request for Quicksilver's character card controller, which is null.
WARNING: There was a request for Quicksilver's character card controller, which is null.
WARNING: There was a request for Quicksilver's character card controller, which is null.
WARNING: There was a request for Quicksilver's character card controller, which is null.
Sharp Tongue makes the damage not redirectable.
Tucker: Moondancer deals Adamant Dr. Medico 1 Sonic damage.
Adamant Dr. Medico is now at 5 HP.
Created decision [SelectTargets/None D280 Tucker]
Created decision [SelectTarget/None D280-1 Tucker]
Adamant Dr. Medico initiates 2 Psychic damage to Adamant Dr. Medico.
WARNING: There was a request for Quicksilver's character card controller, which is null.
WARNING: There was a request for Quicksilver's character card controller, which is null.
WARNING: There was a request for Quicksilver's character card controller, which is null.
WARNING: There was a request for Quicksilver's character card controller, which is null.
Sharp Tongue makes the damage not redirectable.
Adamant Dr. Medico deals Adamant Dr. Medico 2 Psychic damage.
Adamant Dr. Medico is now at 3 HP.
Created decision [SelectTarget/None D280-2 Tucker]
WARNING: There was a request for The Sentinels' character card, which is null.