Wither and Smash (LDC)

[TheJord]

My first Magic TG deck, it is Lorwyn Block

Land - 23

Graven Cairns x2
Mountain x10
Sulfurous Springs x3
Swamp x8

Creatures

Kulrath Knight x4
Ashenmoor Liege x3
Smokeforge x2
Manaforge Cinder x2
Sootstoke Kindler x2
Cinderbones x2
Brightheart Banneret x3
Sickle Ripper x2
Murderous Redcap x2
Grief Tyrant x1

Enchantments

Torture x1

Instants

Scar x3
Puncture Bolt x2

Sorcery

Din of the Fireherd x1
Torrent of Souls x1
Traitors Roar x2

RB Aggro deck, suffers against U pretty bad

[SomeRandomDude]

You see, since MtG games are so short, and since you don't cycle as fast, you never run 1 copy of anything, really. Duplicates are key.

[FM]

Not quite, depending on the build, it's fairly common to see some one-ofs, although I'd recommend starting builds with 3-ofs and 4-ofs, mostly.
However, I ran a Mystical Teachings deck that had AT LEAST 5-6 one-ofs a while ago, and it did pretty well. Testing is the key to figure out quantities. But yeah, start with 3-ofs and 4-ofs.

[SomeRandomDude]

Well...yeah, but that's Mystical Teachings. Tutor decks can afford to run one-ofs.

But he doesn't tutor.

[FM]

Even so, I ran a singleton Loxodon Warhammer in my Mannequin deck, and it worked wonders!
But yeah, we ARE agreeing in one point? one-ofs should be the exception.
Iteration is everything.