How do the Bite omen and the 'Might 4' or 'Speed 3' attack event cards work?

Question

Accepted Answer

The named player rolls the listed number of dice, so Might 4 means four dice. The target rolls their Might or Speed. If the target wins nothing happens; if they lose, they take physical damage like any Might or Speed attack.

Betrayal at House on the Hill (First Edition)

How do the Bite omen and the 'Might 4' or 'Speed 3' attack event cards work?