Historical Rules · 27 February 2026
Rule 701.64b
Official source text from the 27 February 2026 Rules release
Harnessed is a designation that has no rules meaning other than to act as a marker that other spells and abilities can identify. Only permanents can be or become harnessed. Once a permanent becomes harnessed, it stays harnessed until it leaves the battlefield. Harnessed is neither an ability nor part of the permanent’s copiable values.