Necromechanic Does not work all the time

[Crashhard-11537]

My last game, I had a necromechanic on board with 2 health, a mecharoo, and a mechanical whelp. I attacked my opponent’s face, and set off explosive trap; the mecharoo’s deathrattle triggered twice but the mechanical whelp only triggered once. This ultimately lead to me losing because it considerably lowered my board control and my opponent cleared the 1 mechanical dragon that was on board and my mecharoos that popped up as a result of the deathrattled mecharoo.

[shuteye-1545]

I’m surprised that the mecharoo triggered twice, given that the necromechanic died at the same time.

In what order did you play the mecharoo, necromechanic, and mechanical whelp?

[Crashhard-11537]

This is a great way for Hunters to gain board control and I use this technique a lot. But now that you ask about the order in which they were played, I guess I must have never done it in this order before to trigger this same outcome until now. I didn’t know order mattered since they were both on board when they died. I don’t know. The order for the match in question was mecharoo, necro, mech whelp. I’m 95% sure it was Necro and Mecharoo on turn 5, and mech whelp on turn 6 I believe. I just had the opportunity to use spider bomb with the same sequence, instead of mechanical whelp, and it still killed 2 enemies. Very strange.

[Eddetektor-2510]

I got a similar issue and it was well explained so I’ ll copy it here:

@Jetz-1946

The main rule at play in this situation is that there is no aura update between the removal of dead minions and their Deathrattles triggering. Baron Rivendare and Necromechanic will continue to double Deathrattles (and Auchenai will continue to convert healing to damage) until the death phase ends and auras are updated.

This is all well and good - if a bit surprising - but then why are some Deathrattles only going off once? Well there’s another more obscure rule that messes this all up: Whenever a minion is summoned, an aura update occurs. So if one of those Deathrattles summons a minion, it’ll clear out the Deathrattle doubling for all the ones after it. It’ll still be doubled itself because it’s presumably already queued, but every Deathrattle that triggers after it will only happen once.

Album demonstrating this: https://imgur.com/a/x1ZC1xu
Game log of this: https://gist.github.com/Jetz72/163d1e34654eb78238847ed344cd3f51 - Emphasis on Line 89, where you can see the tag for Deathrattle doubling gets set back to 0, inside the block for the Mecharoo’s first Deathrattle. It’s right after the Jo-E bot is summoned, rather than back where the Necromechanic died.