Urza's Armor - Armor made out of a specific, otherwise unobtainable metal? Maybe just steel. Higher coverage then is possible to come across in normal armor. Link in card database:
http://gatherer.wizards.com/Pages/Card/Details.aspx?multiverseid=45484Urza's avenger - Metal creature, probably iron or something similarly soft. Maaaaybe bronze, unlikely. Will have four versions, one with flying, one with building destroyer, one with a natural ranged attack (first strike), unsure how to represent banding. Maybe a faster attack speed or movement speed? Not sure if that really makes a lot of sense but it's a start I guess. Link:
http://gatherer.wizards.com/Pages/Card/Details.aspx?multiverseid=3817Urza's Bauble - Can't think of anything. Link:
http://gatherer.wizards.com/Pages/Card/Details.aspx?multiverseid=159247Urza's Blueprints - Can't think of anything. Link:
http://gatherer.wizards.com/Pages/Card/Details.aspx?multiverseid=12633Urza's Chalice - Can't think of anything. Link:
http://gatherer.wizards.com/Pages/Card/Details.aspx?multiverseid=221105Urza's Contact Lenses - Can't think of anything. Link:
http://gatherer.wizards.com/Pages/Card/Details.aspx?multiverseid=9770Urza's Engine - A creature used soley for seiging, with building destroyer? I dunno if that's possible. Maybe just put it natively in a haunted or evil area, and wave away "wild urza's engines" with being posessed? Seems like the best way of going about things. As always accepting other ideas on the matter. Link:
http://gatherer.wizards.com/Pages/Card/Details.aspx?multiverseid=3064Urza's factory - Hhhmmmm.... maybe a workshop that creates various colors of mana out of various reagents? (Logs for green mana, fish for blue mana, etc) Kind've a stretch. I'll probably make it anyway and people can use it if they want. Link:
http://gatherer.wizards.com/Pages/Card/Details.aspx?multiverseid=116384Urza's Filter - HMMMMM. Maybe a difficult to make item that reduces the amount of mana needed to make other things? Maybe just reduces the colorless mana amount? Maybe converts colored mana to colorless mana. I'll need to see what reactions other people come up with before a definate use can be found, but it has some interesting possibilities.Link:
http://gatherer.wizards.com/Pages/Card/Details.aspx?multiverseid=23227Urza's guilt - Can't think of anything. Link:
http://gatherer.wizards.com/Pages/Card/Details.aspx?multiverseid=23227Urza's Hottub - Can't think of anything. Link:
http://gatherer.wizards.com/Pages/Card/Details.aspx?multiverseid=74345Urza's Incubater - Can't think of anything. Link:
http://gatherer.wizards.com/Pages/Card/Details.aspx?multiverseid=15257Urza's Mine - Maybe a building that generates colorless mana at a very very low rate, using mining as a skill for it? Seems kinda superfluous. Might make it anyway. Link:
http://gatherer.wizards.com/Pages/Card/Details.aspx?multiverseid=220948Urza's Miter - Can't think of anything. Link:
http://gatherer.wizards.com/Pages/Card/Details.aspx?multiverseid=228268Urza's Power plant - Overlap with urza's mine. We'll only need one of the three as workshops can't interact with each other to my knowledge. Link:
http://gatherer.wizards.com/Pages/Card/Details.aspx?multiverseid=220952Urza's Rage - Can't think of anything. Link:
http://gatherer.wizards.com/Pages/Card/Details.aspx?multiverseid=207886Urza's Science Fair project - Highly inconsistant monster? I don't think it's possible to make an inconsistant monster as it uses the primary attack whenever possible and secondary attack if it can't do the primary. If I can get it to work I'll include it. Link:
http://gatherer.wizards.com/Pages/Card/Details.aspx?multiverseid=9731Urza's Tower - Overlap with Urza's mine. We'll only need one of the three as workshops can't interact with each other to my knowledge. Link:
http://gatherer.wizards.com/Pages/Card/Details.aspx?multiverseid=220956