Ankh of Mishra

• WWizards of the Coast2004-10-04
  Official Ruling
  It determines the land's controller at the time the ability resolves. If the land leaves the battlefield before the ability resolves, the land's last controller before it left is used.
• WWizards of the Coast2004-10-04
  Official Ruling
  This triggers on any land entering. This includes playing a land or putting a land onto the battlefield using a spell or ability.

Rulings via Scryfall