When a unit with Deathnell dies, does it still trigger Deathnell before being revived by Zhonya?

Ruling: No, Deathnell does not trigger when Zhonya revives a unit. Zhonya replaces the kill effect, so the unit never dies or goes to the trash.

Nuances:

• For effects like Baited Hook that trigger on kill, the effect still happens when Zhonya protects the unit, but there is no "killed unit" to reference for stats like might
• You would look at the top cards and recycle them all because there's no unit with Null might to reference
• This interaction also applies to Sett's Legend ability