Hearthpwn

Good afternoon.  I was playing a game today where I thought a mage had vaporize down.  I used deathspeaker to give my 7/7 immune this turn and attacked his hero.  To my dismay, vaporize popped and KILLED my IMMUNE minion.  Is this operating as intended??

Yes, it's supposed to work that way.

It is immune to direct damage, not to being vaporized. :)

 Immune

I had exactly the same thing as OP in arena earlier in the week and despite playing since launch, I don't remember that situation coming up before. I tested it and yes the minion does get vaporised because it is immune to damage, not spell effects. 

As an aside I was pretty gutted because it was Dr. 3 towards the fatigue part of the match and I thought I was doing OK. 

Taken from https://hearthstone.gamepedia.com/Immune

Immune is an ability that prevents characters from receiving any damage, and prevents the opponent from specifically targeting them with any type of action. However, it does not prevent destroy, restore Health, or other non-damaging effects on Immune characters, which can still be affected by randomly or automatically targeted effects, including area of effect.

Notes

• Immune effects are always temporary, and only offer immunity for the stated period or while the source is active: after this, the effect is removed.
  • Immune effects on a hero belong to that specific hero, not to the controlling player. For example, if Ice Block gives Immune to a hero that later that turn is replaced by Majordomo Executus's Deathrattle, the resulting hero will lose the Immune effect.^[1]
• Immune prevents all damage that would be dealt to the affected character, regardless of its amount and source (similarly to Divine Shield). In particular:
  • Immune prevents damage from combat, spells, Hero Powers, Battlecries, Deathrattles, Secrets, triggered effects and Fatigue.^[2][3]
  • Immune prevents damage from both enemy and friendly sources, such as Flame Imp and Life Tap.^[2][4]
  • Effects that triggers when damage is dealt (such as Frothing Berserker) will not trigger if the damage is prevented by Immune.^[5]
  • Immune characters are not protected from all other sources of harm or attack, such as Equality and Twisting Nether.
  • Immune characters will still deal damage normally.
  • For additional details, see Damage#Advanced rules.
• An Immune character cannot be actively targeted by the opponent (similarly to Stealth). This includes combat attacks as well as targeted spells, Battlecries and Hero Powers. In particular:
  • Immune characters can be targeted by enemy effects that are automatically targeted (such as Vaporize)^[6] or randomly targeted (such as Ragnaros the Firelord, Knife Juggler or Clumsy characters), although any resulting damage will still be prevented.^[7][8][9]
  • Immune characters can be actively targeted by the controlling player, although any resulting damage will still be prevented. For example, a player can use healing and destroy effects on their own Immune hero or minions to full effect.

• Misdirection does not trigger if an Immune hero is the only available redirect target.^[13] In addition, it is believed (with 99.2% confidence, i.e. 1/128 probability of being incorrect) that Misdirection cannot select an Immune character as the defender, even if it does trigger.^[14]
• As with Stealth, Taunt minions that are Immune have their Taunt ability temporarily suppressed, and can thus be bypassed.^[15][16]
• Immune effects will not prevent the game from ending automatically at the start of the 90th turn: for example, if both players have a Mal'Ganis in play and refuse to attack each other, the game will end in a draw at the beginning of the 90th turn.^[17][18]
• Although not explicitly stated in the card's text, Gorehowl has a triggered effect that grants a temporary Immune effect to the weapon itself, which protects it from Durability losses the same way Immune effects on characters protect them from damage. For additional information, see Gorehowl.

So... if the Paladin DK summons his 4 guys vs an opponent with Mal'Ganis on the board, he wins?

^

Yes.

Thanks for the information everyone.  A lesson well learned.  Thought I could be sneaky and immune my guy into a vaporize.

Quote from Slydie >>

So... if the Paladin DK summons his 4 guys vs an opponent with Mal'Ganis on the board, he wins?