When Hidden Blade or Baited Hook targets a unit that gets protected by Zhonya's, do their draw/summon effects still resolve?

Ruling: Hidden Blade will still draw 2 cards, but Baited Hook will not summon a unit.

Nuances:

• Hidden Blade references "its controller" which only requires the target was valid at resolution, not that the unit actually died
• Baited Hook references "the killed unit" and its might, so if no unit died (protected by Zhonya's), no might value exists and the effect cannot resolve
• Both effects will still reveal the top card of deck as part of resolution