- 'Modern Oracle Text':
[spoiler='Urza's Mine']
{T}: Add {1} to your mana pool. If you control an Urza's Power-Plant and an Urza's Tower, add {2} to your mana pool instead.
- 'Urza's Power Plant':
{T}: Add {1} to your mana pool. If you control an Urza's Mine and an Urza's Tower, add {2} to your mana pool instead.
- 'Urza's Tower':
{T}: Add {1} to your mana pool. If you control an Urza's Mine and an Urza's Power-Plant, add {3} to your mana pool instead.
- 'Urza's Factory':8681:
{T}: Add {1} to your mana pool.
{7}, {T}: Put a 2/2 colorless Assembly-Worker artifact creature token onto the battlefield.
The Urzatron is one of the most famous and powerful examples of mana acceleration and was reprinted in both Eighth and Ninth Editions.
Discuss.