What is Chaos Sealed?

We're SO glad you asked!

Chaos Sealed is a variant of Sealed Deck; the Chaos element comes in when you choose the product used to build your deck. Each Magic set is assigned a point value, ranging from 0 for Chronicles to 5 for Tempest. You have 15 points to use, and must choose exactly 5 booster "sets". (A set is one 15- or 12-card booster, or two 8-card boosters.)

Land is a precious resource; you only get 5 of each basic land (four regular, one snow-covered).

Chaos Sealed is typically played for ante; having limited land makes the ante loss of a land from your primary color a truly devastating blow. During deckbuilding, you may find yourself agonizing over difficult choices - like whether to save that game-breaking rare you need for your collection, or play it and risk losing it.

Like other limited formats, you build a deck of at least 40 cards. Unlike typical sealed deck, you can't add as much land as you want - just the 5 of each that you began with, plus any you were lucky enough to open.

If you don't spend all 15 points on your boosters, you can get extra basic land (1 point each).

Sound interesting? Sound like fun? (It is!) Simple, too.

And just maybe, the best Magic format of all!

Notes on latest changes:
April 2010
Rise begins and stays at 4½, a bunch more reductions in older sets.
November 2009
Reborn stabilizes at 6, Zendikar enters and establishes itself at 3.
July 2009
Onslaught and Odyssey finally seemed to live up (down?) to their value at the new, lower cost.
June 2009
Just continuing to devalue older sets, and recognizing that Reborn is really good since mana fixing is now plentiful. Also noting that basic land is of little concern now, since 5-color is common (see note re: mana fixing), and newer sets include basics anyway. This devalued extra lands and older sets that included land.
April 2009
The morphs in Onslaught are just overcosted compared to Future Sight and Future Sight is not a problem at 3. Alliances' creatures are just obsolescent and the set is only 12 cards. It contributes much like Homelands, but it certainly is not a 0. Tests only used Mirage, but it compared unfavorably to Odyssey, and the Mirage block is fairly balanced across all three sets. Coldsnap's new value is, admittedly, an experiment — but it's in line with the recent trend of ever-increasing power.

Chaos Values

Booster Set	Value
Unlimited	2½
Revised	2½
4th	1½
5th	1½
6th	1
7th - 10th	2
M2010	3
Portal (not tested)	n/a
Starter	2
Unglued (forget it)	n/a
Unhinged (under review)	7¾
Chronicles	½
Renaissance x2	2
Arabian Nights x2	3
Antiquities x2	1
Legends	1
The Dark x2	0
Fallen Empires x2	½
Ice Age	1
Homelands x2	0
Alliances	1
Mirage	2
Visions	2
Weatherlight	2
Tempest	4	was 4½
Stronghold	2½
Exodus	2½	was 3
Urza's Saga	1½	was 2
Urza's Legacy	3	was 3½
Urza's Destiny	2½	was 3
Mercadian Masques	1
Nemesis	2
Prophecy	1½
Invasion	3
Planeshift	2½
Apocalypse	3
Odyssey	1½
Torment	2½
Judgment	2½
Onslaught	1½	was 2
Legions	3½	was 4
Scourge	3	was 3½
Mirrodin	3
Darksteel	3½
Fifth Dawn	4½
Champions of Kamigawa	2½
Betrayers of Kamigawa	1½
Saviors of Kamigawa	2
Ravnica	3½
Guildpact	4½
Dissension	4
Coldsnap	4
Time Spiral	4
Planar Chaos	3	was 3½
Future Sight	3
Lorwyn	3½
Morningtide	3
Shadowmoor	3½	was 4
Eventide	5
Shards of Alara	3½
Conflux	4
Alara Reborn	6
Zendikar	3
Rise of the Eldrazi	4½	new
Extra land, Basic/Snow Covered	½