Necro + Mana Vault

[Shean]

I found an old post regarding this but I just wanted to make sure this was correct, as there was no reply.

Some people don't seem to understand the interaction between a tapped Mana Vault and Yawgmoth's Bargain/Necropotence (player skips draw step so doesn't take any damage), so maybe something on that should be included, too.

I ran into this on MWS.  Had Necro'd myself down to 4 with GTutor in hand, planning to have 1 life left after casting GTutor next turn.  My opponent insisted that I had to take 1 dmg from the Mana Vault.

[IthilanorStPete]

You're entirely correct. Note that you can still untap Mana Vault.

[Shean]

Thanks.

[SadPanda]

Mana Vault doesn't untap during your untap step.

At the beginning of your upkeep, you may pay 4 Mana. If you do, untap Mana Vault.

At the beginning of your draw step, if Mana Vault is tapped, it deals 1 damage to you.

Tap: Add 3 Mana to your mana pool.

For reference this is the oracle text on Mana Vault straight from wizard's homepage. The card as it is printed was changed to this wording a long time ago.