FOILCheapest priced copy (Core Set 2020): $0.49 at Card Kingdom, near mint, their price list as of .
Chandra's Regulator 
Legendary Artifact · Rare · Core Set 2020 Promos · #131
Whenever you activate a loyalty ability of a Chandra planeswalker, you may pay {1}. If you do, copy that ability. You may choose new targets for the copy.
{1}, {T}, Discard a Mountain card or a red card: Draw a card.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
4 printings · $0.49 to $0.69 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Core Set 2020 | 131 | Rare | $0.49 | $0.49 |
| Core Set 2020 Promos | 131 | Rare | — | $0.49 |
| Core Set 2020 Promos | 131p | Rare | $0.59 | $0.49 |
| Core Set 2020 Promos | 131s | Rare | — | $0.69 |
5 rulings from Wizards of the Coast
- 12 July 2019Copying a loyalty ability doesn’t add or remove loyalty counters from any object.
- 12 July 2019If the loyalty ability has −X in its cost, the copy uses the same value of X.
- 12 July 2019The 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.
- 12 July 2019You can’t pay {1} more than once for each time the triggered ability of Chandra’s Regulator resolves.
- 12 July 2019A 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.