Simple list of cards affected by the proposed rarity changes*:

Aeolipile
Aladdin
Aladdin’s Lamp
Aladdin’s Ring
Ali from Cairo
Anaba Spirit Crafter
Angelic Voices
An-Havva Constable
Annaba Ancestor
An-Zerrin Ruins
Apocalypse Chime
Apprentice Wizard
Arcades Sabboth
Arena of the Ancients
Argivian Archeologist
Arkon Legionnaire
Autumn Willow
Axelrod Gunnerson
Ayesha Tanaka
Aysen Crusader
Aysen Highway
Baki’s Curse
Ball Lightning
Balm of Restoration
Barl’s Cage
Baron Sengir
Beast Walkers
Black Carriage
Blood Moon
Bottle of Suleiman
Bottomless Vault
Broken Visage
Bronze Horse
Bronze Tablet
Candelabra of Tawnos
Chain Stasis
Chandler
Chromium
City in a Bottle
City of Shadows
Cleansing
Clockwork Avian
Colossus of Sardia
Conch Horn
Concordant Crossroads
Coral Helm
Cursed Rack
Cyclone
Dakkon Blackblade
Dance of Many
Dancing Scimitar
Daughter of Autumn
Delfi’s Cube
Derelor
Diamond Valley
Didgeridoo
Draconian Cylix
Drop of Honey
Dwarven Armorer
Dwarven Holds
Dwarven Pony
Dwarven Sea Clan
Ebon Praetor
Ebony Horse
Elephant Graveyard
El-Hajjaj
Elven Lyre
Elvish Farmer
Eternal Flame
Exorcist
Faerie Noble
Feroz’s Ban
Forget
Frankenstein’s Monster
Fungal Bloom
Gabriel Angelfire
Gaea’s Avenger
Gauntlets of Chaos
Goblin Flotilla
Goblin Warrens
Goblin Wizard
Golgothian Sylex
Grandmother Sengir
Grave Robbers
Greater Werewolf
Guardian Beast
Hand of Justice
Hazduhr the Abbot
Heart Wolf
Hell’s Caretaker
Hidden Path
Hollow Trees
Homarid Shaman
Horn of Deafening
Hurkyl’s Recall
Icatian Skirmishers
Icatian Town
Icatioan Lieutenant
Ication Stores
Ifh-Biff Efreet
Implements of Sacrifice
Inferno
Ironclaw Curse
Island Fish Jasconius
Island of WaK-Wak
Jalum Tome
Jandor’s Ring
Jandor’s Saddlebags
Jeweled Bird
Jihad
Johan
Joven
Junun Efreet
Juxtapose
Juzam Djinn
Kai Takahashi (C1=U)
King Suleiman
Knights of Thorn
Koskan Falls
Land’s Edge
Leeches
Leviathan
Lurker
Mammoth Harness
Mana Clash
Mana Vortex
Marhault Elsdragon (C1=U)
Marjhan
Martyr’s Cry
Mijae Djinn
Mind Bomb
Mishra’s Factory (C1/U1 = U)
Mishra’s War Machine
Mystic Decree
Nameless Race
Narwhale
Nebuchadnezzar
Niall Silvain
Nicol Bolas
Obelisk of Undoing
Old Man of the Sea
Orgg
Palladia-Mors
Petra Sphinx
Preacher
Primal Order
Prophecy
Psychic Allergy
Pyramids
Rag Man
Rainbow Vale
Rakalite
Reeveka Wizard Savant
Repentant Blacksmith
Revelation
Ring of Ma’ruf
Ring of Renewal
River Merfolk
Rubina Soulsinger
Rysorian Badger
Safe Haven
Sand Silos
Scarwood Bandits
Season of the Witch
Sengir Autocrat
Serendib Efreet
Serpent Generator
Serra Aviary
Serra Bestiary
Shahrazad
Shapeshifter
Shatterstorm
Singing Tree
Sivitri Scarzam
Sol’kanar the Swamp King
Soraya the Falconer
Sorrows Path
Spirit Shield
Stangg
Stone Calendar
Strip Mine (C1/U1 = U)
Tawno’s Coffin
Teleport
Tetravus
The Wretched
Thelon’s Curse
Thelonite Monk
Timmerian Fiends
Tobias Andrion (C1=U)
Tor Wauki (C1=U)
Tracker
Triassic Egg
Triskelion
Truce
Urza’s Avenger
Urza’s Miter
Vaevictis Asmadi
Veldrane of Sengir
Vodalian Knights
Vodalian War Machine
Vodoo Doll
Wall of Kelp
Willow Priestess
Winter Sky
Worms of the Earth
Wormwood Treefolk
Xira Arien
Yawgmoth Demon
Ydwen Efreet
Zelyon Sword

Total: 210 Affected Cards

*Some cards on this list may be repeated, may be out of alphabetical order, or may be printed at a lower rarity in another set (and thus would be legal in Peasant Magic). Please contact me via e-mail if you notice any of these changes, which need to be corrected. 

- chaps_man@hotmail.com

C1 – U
Maze of Ith
Mishra’s Factory
Strip Mine
Aesthir Glider
Clockwork Gnomes
Clockwork Steed
Clockwork Swarm
Cursed Rack
Delif’s Cone
Ebony Rhino
Reterothopter
Serrated Arrows
Kei Takahashi
Marhault Elsdragon
Svitri Scarzam
Tobias Andrion
Tor Wauki
Darkness
Greator Werewolf
Headless Horseman
Headstone
Hell Swarm
Spirit Shackle