How the Life Drain effect calculates if I fail CON save? [duplicate]

By | June 13, 2018

This question already has an answer here:

My character was hit by a Wraith's Life Drain, and it was a critical hit. My HP was at 29/33, and I took 32 necrotic damage.

How order of the max HP reduction should be calculated?

My interpretation:

  1. 29/33 HP
  2. Takes 32 necrotic dmg, fail CON save
  3. -3/1 HP
  4. Dies

My DM interpretation

  1. 29/33 HP
  2. Takes 32 necrotic dmg, fail CON save
  3. -3/33 HP, die? No.
  4. 0/1 HP, unconscious.

Which interpretation is right?