As you all know, cards are often designed using inspiration drawn from previous cards. Urza's Destiny contains two cycles of cards that were inspired by Tempest cards. The first cycle was inspired by Lobotomy, and included Eradicate, Quash, Scour, Splinter, and Sowing Salt.
The second cycle were the creature enchantments Incendiary, Momentum, Archery Training, Private Research, and Festering Wound. Which Tempest card inspired them? Answer below.
The answer is Legacy's Allure, which featured a "growing" mechanic that was used throughout the Urza's block.