Decklist – Three-Color No-Rare Control

The best way to build on a budget is to stick to commons and uncommons. Some cards that are rare now were uncommon or common before (Example: Story Circle). So, look for the older uncommon or common version. Avoiding rares can save you a lot of money!
Three-Color No-Rare Control
4 Force of Will
4 Mana Drain
4 Psionic [...]

Decklist – Relentless Rats

Here is a great casual deck idea. Relentless Rats gets bigger for each Relentless Rats in play. Produce swarms and swarms of them, and overrun your opponent!
Relentless Rats
1 Relentless Rats
4 Clone
4 Vesuvan Doppelganger
4 Dance of Many
4 Unstable Shapeshifter
4 Volrath’s Shapeshifter
4 Soul Foundry
4 Animate Dead
4 Necromancy
1 Skull of Orm
1 Haunted Crossroad
1 Volrath’s Stronghold
4 Underground Sea
4 Salt [...]

Decklist – Sizzle Blizzard

4 Sizzle
4 Blizzard
4 Death’s-Head Buzzard
4 Skizzik
3 Soul Net
3 Izzet Signet
3 Muzzle
3 Frazzle
2 Zap
2 Bamboozle
2 Meddle
1 Twiddle
1 Mask of Riddles
10 Island
4 Scrubland
4 City of Brass
3 Scabland
2 Badlands
1 City of Ass