MYOS - Make Your Own Standard

[DazBoot]

MYOS is a format from the 2007 Invitational.

You pick two blocks (Ice Age forward) and a core set (5th forward) and build a deck.

It uses the Legacy and Block banned lists.

So, if you have an old Fires deck from when you first started, it should be perfectly legal in MYOS.

Additional dismbiguation:
You've probably seen MYOS as BYOS. That's the name I've been using for a while. All the literature from the invitational lists it as MYOS (Make your own Standard), so that's the name we'll use.

Here are the Banned lists:

The following cards are banned in Legacy tournaments:

Amulet of Quoz
Ancestral Recall
Balance
Bazaar of Baghdad
Black Lotus
Black Vise
Bronze Tablet
Channel
Chaos Orb
Contract from Below
Darkpact
Demonic Attorney
Demonic Consultation
Demonic Tutor
Dream Halls
Earthcraft
Entomb
Falling Star
Fastbond
Flash
Frantic Search
Goblin Recruiter
Grim Monolith
Gush
Hermit Druid
Illusionary Mask
Imperial Seal
Jeweled Bird
Land Tax
Library of Alexandria
Mana Crypt
Mana Drain
Mana Vault
Memory Jar
Metalworker
Mind Twist
Mind's Desire
Mishra's Workshop
Mox Emerald
Mox Jet
Mox Pearl
Mox Ruby
Mox Sapphire
Necropotence
Oath of Druids
Rebirth
Shahrazad
Skullclamp
Sol Ring
Strip Mine
Tempest Efreet
Time Spiral
Time Vault (Effective September 20, 2008)
Time Walk
Timetwister
Timmerian Fiends
Tinker
Tolarian Academy
Vampiric Tutor
Wheel of Fortune
Windfall
Worldgorger Dragon
Yawgmoth's Bargain
Yawgmoth's Will

The following cards are banned in Block Constructed Tournaments:

AEther Vial (Mirrodin Block)
Ancient Den (Mirrodin Block)
Arcbound Ravager (Mirrodin Block)
Darksteel Citadel (Mirrodin Block)
Disciple of the Vault (Mirrodin Block)
Great Furnace (Mirrodin Block)
Seat of the Synod (Mirrodin Block)
Tree of Tales (Mirrodin Block)
Vault of Whispers (Mirrodin Block)
Skullclamp (Mirrodin Block)
Lin Sivvi, Defiant Hero (Masques Block)
Rishadan Port (Masques Block)
Gaea’s Cradle (Urza Block)
Memory Jar (Urza Block)
Serra’s Sanctum (Urza Block)
Time Spiral (Urza Block)
Tolarian Academy (Urza Block)
Voltaic Key (Urza Block)
Windfall (Urza Block)
Cursed Scroll (Tempest Block)
Squandered Resources (Mirage Block)
Amulet of Quoz (Ice Age Block)
Thawing Glaciers (Ice Age Block)
Zuran Orb (Ice Age Block)

And he's a page that explains it, including a Rosewater video with him using a light saber as a pointer on his white board:
www.wizards.com/Magic/Magazine/Article.aspx?x=mtgcom/daily/mr303

[Kiki]

question:
If you are using M11 as your core set, can you play voltaic key?

[vultanphase]

I would assume "Only if you're not playing Urza's Block"

[DazBoot]

I like that ruling.