Banned
Mana Vault
Artifact · {1}
Rationale
Why banned
Mana Vault produces three colorless mana for one mana with minimal drawback at tournament timescales, representing broken mana acceleration. Banned at the format's founding.
Oracle text
What the card does
! This card is currently banned in Premodern. The oracle text is shown for reference only.
This artifact doesn't untap during your untap step.
At the beginning of your upkeep, you may pay {4}. If you do, untap this artifact.
At the beginning of your draw step, if this artifact is tapped, it deals 1 damage to you.
{T}: Add {C}{C}{C}. Format authority
Cited from premodernmagic.com
Per Martin Berlin's Premodern format-authority site: premodernmagic.com/rules . premodernmtg.com mirrors the canonical banlist within 24 hours of any update.
Full analysis
The combo, the data, and the new metagame
Banned 2003-05-26. Rationale: Mana Vault produces three colorless mana for one mana with minimal drawback at tournament timescales, representing broken mana acceleration. Banned at the format’s founding. Source: Martin Berlin, premodernmagic.com.
See also: /mana-vault/