This is in my opinion one of the most effective beater decks that we can build with the cards from the first five sets (LOB, MRD, MRL, PSV, LON) and abiding by the Limited and Forbidden list of April 2003.
April 2003 Beatdown
Monsters
3 Amphibian Beast
3 Blazing Inpachi
3 Gemini Elf
3 Mechanicalchaser
3 Summoned Skull
3 Goblin Attack Force
1 Jinzo
Spells
1 Change of Heart
1 Dark Hole
2 Graceful Charity
2 Harpie's Feather Duster
1 Monster Reborn
1 Pot of Greed
1 Premature Burial
1 Raigeki
1 Snatch Steal
3 Soul Exchange
1 United We Stand
1 Upstart Goblin
Traps
1 Call of the Haunted
1 Magic Cylinder
1 Mirror Force
1 Solemn Judgment
1 Torrential Tribute
Here is the link to the YouTube playlist for this deck:
https://www.youtube.com/playlist?list=PL4fjHQoGTndUkKKlpv-AswwaJjMd6o9XI