Hushbringer

The trigger event doesn't have to specifically refer to "creatures." In these cases, the trigger event may also refer to something being "put into a graveyard from the battlefield." For example, an ability that triggers "whenever an artifact is put into a graveyard from the battlefield" won't trigger if an artifact creature dies while Hushbringer is on the battlefield.

An ability that triggers on an event that causes a creature to die will still trigger. For example, an ability that triggers "whenever you sacrifice a creature" still triggers.

Abilities that apply "as [this creature] enters the battlefield," such as choosing a color with Diamond Knight, are unaffected.

An ability that triggers when a creature "leaves the battlefield" won't trigger if that creature leaves the battlefield by dying.

Look at each permanent as it exists on the battlefield, taking into account continuous effects that apply to it after entering or before dying, to determine whether any triggered abilities will be stopped from triggering. For example, if a land that has become a creature dies, an ability that triggers when it dies doesn't trigger.