When you use Temporal Portal to repeat Hidden Blade twice on the same target, and the enemy uses Zhonya's on one of the kills, does the second death effect trigger? Does the enemy draw 2 or 4 cards total?

Ruling: This question was not definitively answered in the thread.

Nuances:

• Playing a spell from hidden is considered a discount, not a cost modification, so Temporal Portal's repeat would not make the hidden cost free
• This interaction has been discussed extensively in other threads without clear resolution
• Official clarification from Riot is needed