Highlander

Highlander is a Constructed variant which allows only one copy of each card in the deck, with the exception of basic lands.

Rules

Decks must consist of a minimum of 100 cards.
Any card from Alpha up through the latest Magic set can be used (except for banned cards). Cards from the Portal sets, International Collector Editions, and Championship decks can be used provided you put all your cards in opaque sleeves and the International Collector Edition card edges are rounded.
There is no restriction on the number of basic and snow-covered basic lands you can include in your deck.
No sideboards are used.
Special mulligan rule: If your opening hand consists of 0, 1, or 7 lands, you can show your cards to your opponent reshuffle and draw 7 new cards. If a player chooses to take a special mulligan, he can then choose to take as many normal Paris-mulligans as he chooses by reshuffling and drawing one less card each time.
The following cards are banned: Ancestral Recall, Black Lotus, Chaos Orb, Crop Rotation, Dust Bowl, Falling Star, Fastbond, Imperial Seal, Library of Alexandria, Mana Crypt, Mana Vault, Memory Jar, Mind Over Matter, Mind Twist, Mox Emerald, Mox Jet, Mox Pearl, Mox Ruby, Mox Sapphire, Mystical Tutor, Power Artifact, Skullclamp, Sol Ring, Strip Mine, Time Walk, Timetwister, Tinker, Trinisphere, Umezawa's Jitte, Vampiric Tutor, Wheel of Fortune, Worldgorger Dragon, all ante cards (Amulet of Quoz, Bronze Tablet, Contract from Below, Darkpact, Demonic Attorney, Jeweled Bird, Rebirth, Tempest Efreet, Timmerian Fiends), and all cards from Unglued and Unhinged except for basic lands.

One legendary, usually multi-colored, creature of at least 6 converted mana cost is chosen as your general. It counts as one of your hundred.
All other cards in the deck must be one of the colors of the general or colorless. This includes lands, artifacts. This however doesn't include cards that are additional colors, or alternate colors so, if you general is white-and-green, only white, green, white-and-green and colorless cards are allowed.

The amount of life a player starts with is 200 divided by the number of players.