Cheapest priced copy (Commander Legends: Battle for Baldur's Gate): $0.49 at Card Kingdom, near mint, their price list as of .
Jade Orb of Dragonkind 
Artifact · Common · Commander Legends: Battle for Baldur's Gate · #236
{T}: Add {G}. When you spend this mana to cast a Dragon creature spell, it enters with an additional +1/+1 counter on it and gains hexproof until your next turn. (It can't be the target of spells or abilities your opponents control.)
Legal inCommanderLegacyVintagePauper
Not legal inBrawlStandardPioneerModern
1 printing · $0.49 to $0.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Commander Legends: Battle for Baldur's Gate | 236 | Common | $0.49 | $0.99 |
4 rulings from Wizards of the Coast
- 10 June 2022If the mana is spent on a Dragon creature spell, that creature will have hexproof as soon as it enters the battlefield. There is no opportunity to target the creature before it gains hexproof.
- 10 June 2022If more than one {G} produced by a Jade Orb of Dragonkind is spent to cast a single Dragon creature spell, the delayed triggered ability associated with each mana spent will trigger. That creature will enter the battlefield with that many +1/+1 counters.
- 10 June 2022The mana created by Jade Orb of Dragonkind can be spent on anything, not just Dragon creature spells.
- 10 June 2022The delayed triggered ability will trigger whether Jade Orb of Dragonkind is still on the battlefield or not.