Harbinger of the Seas + Choke

Harbinger of the Seas

Choke

How it works

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.

This lockdown strategy relies on fundamentally rewriting the landscape of the board. Harbinger of the Seas does the heavy lifting by turning every nonbasic land into an Island, stripping away their original identities and mana-producing flexibility. Once those lands are effectively transformed into vulnerable targets, Choke steps in to permanently freeze them out, ensuring they stay tapped and useless during their controllers' untap steps. Together, these two cards create a devastating mass land denial lock that leaves opponents struggling to cast spells while you dictate the pace of the game.