If an area attack covers several squares of one large foe, does the foe take damage once or once per square?

Question

Accepted Answer

Once. A large foe cannot be targeted or attacked twice by a multi-target attack, so it takes the damage once however many of its squares the attack covers.

Arydia: The Paths We Dare Tread

If an area attack covers several squares of one large foe, does the foe take damage once or once per square?