When Urza enters the battlefield, it, Deadeye Navigator's soulbond ability and Genesis Chamber trigger.
Resolve the Urza trigger, creating a 0/0 Construct artifact creature token.
Resolve the Genesis Chamber trigger, creating a 1/1 Myr artifact creature token.
Resolve the Deadeye Navigator trigger, repairing it and Urza.
Activate Urza's first ability twice by tapping the Myr and Construct, adding .
Repeat.
This clever loop transforms Urza, Lord High Artificer into a self-sustaining engine by pairing him with Deadeye Navigator for repeatable blinking power. Every time Urza re-enters the battlefield, Genesis Chamber triggers to generate a fresh Myr artifact creature token alongside Urza's own massive Construct token. Those newly minted tokens immediately pay for themselves by being tapped for blue mana via Urza's ability, funding the exact amount of mana required to activate Deadeye Navigator's blink ability and restart the entire cycle.