Deadeye Navigator + Panharmonicon + Wily Goblin

Steps

1. Activate Wily Goblin by paying {1}{U}, blinking it.
2. When Wily Goblin enters, it and Deadeye Navigator's soulbond ability trigger twice.
3. Resolve both Deadeye Navigator triggers, repairing it and Wily Goblin.
4. Resolve both Wily Goblin triggers, creating two Treasure tokens.
5. Activate both Treasures by tapping and sacrificing them, adding {1}{U}.
6. Repeat.