Chandra's Regulator

• WWizards of the Coast2019-07-12
  Official Ruling
  Copying a loyalty ability doesn’t add or remove loyalty counters from any object.
• WWizards of the Coast2019-07-12
  Official Ruling
  If the loyalty ability has −X in its cost, the copy uses the same value of X.
• WWizards of the Coast2019-07-12
  Official Ruling
  The triggered ability of Chandra’s Regulator and the copy it creates both resolve before the loyalty ability that caused it to trigger. They resolve even if that loyalty ability is countered.
• WWizards of the Coast2019-07-12
  Official Ruling
  You can’t pay more than once for each time the triggered ability of Chandra’s Regulator resolves.
• WWizards of the Coast2019-07-12
  Official Ruling
  A Mountain card is a land card with the subtype Mountain, not any land card with a mana ability that produces red mana. Land cards are normally colorless, even if they produce red mana.

Rulings via Scryfall