I've never made a competitve legacy deck, but I'm a huge Bulls fan so I'm thinking about running something like this:

Creatures- 20

4x Dark Confidant

4x Mother of Runes

4x Goblin Guide

4x Grim Lavamancer

4x Deathrite Shaman

Spells- 20

4x Lightning Bolt

4x Inquisition of Kozilek

4x Thoughtseize

4x Swords to Plowshares

4x Path to exile

Lands- 20

4x Badlands

4x Scrubland

4x Bloodstained Mire

4x Marsh Flats

4x Arid Mesa

Sideboard- 15

4x Smelt

4x Surgical Extraction

4x Red Elemental Blast

3x Pyroblast

What do you guys think?

Creatures- 20

4x Dark Confidant

4x Mother of Runes

4x Goblin Guide

4x Grim Lavamancer

4x Deathrite Shaman

Spells- 20

4x Lightning Bolt

4x Inquisition of Kozilek

4x Thoughtseize

4x Swords to Plowshares

4x Path to exile

Lands- 20

4x Badlands

4x Scrubland

4x Bloodstained Mire

4x Marsh Flats

4x Arid Mesa

Sideboard- 15

4x Smelt

4x Surgical Extraction

4x Red Elemental Blast

3x Pyroblast

What do you guys think?