Urza, Lord High Artificer, Worldwalker Helm, and Replication Specialist

Prerequisites

• Urza, Lord High Artificer on the battlefield
• Worldwalker Helm in hand
• Replication Specialist on the battlefield
• available

Steps

1. Cast Worldwalker Helm by paying
2. When Worldwalker Helm enters the battlefield, Replication Specialist triggers, causing you to pay to create a token copy of Worldwalker Helm and a Map token
3. Activate Urza's first ability by tapping a Worldwaker Helm and a Map, adding
4. Activate a Worldwalker Helm by paying and tapping it, creating a token copy of the Worldwalker Helm token and two Map tokens
5. Activate Urza's first ability twice by tapping the Maps, adding
6. Repeat from step 4

Results

• Infinite tapped Map tokens