All creatures gain fear until end of turn. (They can't be blocked except by artifact creatures and/or black creatures.)
Cycling
(
, Discard this card: Draw a card.)
When you cycle Dirge of Dread, you may have target creature gain fear until end of turn.
When you cycle this card, first the cycling ability goes on the stack, then the triggered ability goes on the stack on top of it. The triggered ability will resolve before you draw a card from the cycling ability.