Scion of the Ur-Dragon [Time Spiral] Saga where X is the amount

where X is the amount of mana that player paid this way

That creature can't block this turn

Set: Magic 2010 Type: Enchantment Rare Cost: {4}{G}{G} Whenever an opponent casts a spell

Set: Exodus Type: Instant Uncommon Cost: {1}{R} Price of Progress deals damage to each player equal to twice the number of nonbasic lands that player controls

Set: Limited Edition Beta Type: Instant Rarity: Rare Cost: {U} Change the text of target spell or permanent by replacing all instances of one basic land type with another

Scion of the Ur-Dragon [Time Spiral] Saga where X is the amountSet: Time Spiral Type: Legendary Creature Dragon Avatar Rare Cost: {W}{U}{B}{R}{G} Flying {2}: Search your library for a Dragon permanent card and put it into your graveyard. If you do, Scion of the Ur Dragon becomes a copy of that card until end of turn. Then shuffle your library. "I am the blood of the ur dragon, coursing through all dragonkind."