Urza Block

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Everything is from Urza block.
There is no 5-color identity Legendary Creature from Urza block, so I punted and use Fertile Ground (since it references "any color" at least).
If someone ever were to balk at it (no one ever does), I would go off-theme and use Sliver Queen.
 
Mana Acceleration (8): General (1): Spells (28): Sideboard (Omitted/Cut card ideas):
1 Thran Dynamo 1 Fertile Ground 1 Barrin's Codex 1 Covetous Dragon
1 Argothian Elder   1 Chimeric Staff 1 Levitation
1 Carpet of Flowers Creatures (27): 1 Citanul Flute 1 Ancient Silverback
1 Grim Monolith 1 Beast of Burden 1 Crawlspace  
1 Lotus Blossom 1 Karn, Silver Golem 1 Memory Jar  
1 Worn Powerstone 1 Dark Hatchling 1 Phyrexian Processor  
1 Yavimaya Elder 1 Phyrexian Plaguelord 1 Temporal Aperture  
1 Priest of Titania 1 Skirge Familiar 1 Urza's Blueprints  
  1 Archivist 1 Attrition  
Lands (36): 1 Aura Thief 1 No Mercy  
1 Drifting Meadow 1 Blizzard Elemental 1 Pestilence  
1 Polluted Mire 1 Great Whale 1 Phyrexian Reclamation  
1 Remote Isle 1 Morphling 1 Yawgmoth's Will  
1 Slippery Karst 1 Palinchron 1 Opportunity  
1 Smoldering Crater 1 Peregrine Drake 1 Opposition  
1 Faerie Conclave 1 Temporal Adept 1 Rewind  
1 Forbidding Watchtower 1 Citanul Hierophants 1 Stroke of Genius  
1 Ghitu Encampment 1 Elvish Piper 1 Time Spiral  
1 Spawning Pool 1 Multani, Maro-Sorcerer 1 Windfall  
1 Treetop Village 1 Thorn Elemental 1 Abundance  
1 Gaea's Cradle 1 Weatherseed Treefolk 1 Compost  
1 Phyrexian Tower 1 Yavimaya Wurm 1 Defense of the Heart  
1 Serra's Sanctum 1 Lightning Dragon 1 Greater Good  
1 Shivan Gorge 1 Shivan Hellkite 1 Angelic Chorus  
1 Yavimaya Hollow 1 Shivan Phoenix 1 Glorious Anthem  
4 Swamp 1 Viashino Heretic 1 Opal Archangel  
6 Island 1 Intrepid Hero 1 Serra's Liturgy  
6 Forest 1 Karmic Guide 1 Worship  
2 Mountain 1 Radiant, Archangel    
3 Plains 1 Serra Avatar