Harbinger of the Seas, and Choke

Prerequisites

• Harbinger of the Seas on the battlefield
• Choke on the battlefield

Steps

1. Because Harbinger of the Seas causes all nonbasic lands to be Islands, and Choke prevents Islands from untapping during their controller's untap steps, nonbasic lands do not untap during their controller's untap steps

Results

• Nonbasic lands do not untap during their controller's untap steps