Activate Experimental Aviator by paying 1, blinking it.
When Experimental Aviator enters the battlefield, it and Deadeye Navigator's soulbond ability trigger.
Resolve the Deadeye Navigator trigger, repairing it and Experimental Aviator
Resolve the Experimental Aviator trigger, creating two artifact tokens.
Activate Urza's first ability twice by tapping two artifacts, adding .
Repeat.
This elegant loop turns the mechanical synergy of Urza, Lord High Artificer, Deadeye Navigator, and Experimental Aviator into an endless mechanical engine. By using Deadeye Navigator's soulbond ability to repeatedly blink Experimental Aviator, you continuously generate a fresh supply of flying Thopter artifact creature tokens. Urza, Lord High Artificer steps in to harness those newly minted artifacts, tapping them for blue mana to sustain the exact activation costs required to keep the Deadeye Navigator blinking cycle going infinitely.