Jondo Mouren the Crest Merchant can be found in the Palace Courtyard at Westmarch -- near the Elder Rift. He sells Rare Crests and Legendary Crests.
Rare Crest: Use when opening an Elder Rift to add a modifier to the Rift. Completing the Elder Rift grants Fading Embers to all party members and guarantees you 3 Runes. Costs 100 Eternal Orb.
Legendary Crest: Use when opening an Elder Rift to add 2 modifiers to the Rift. Completing the Elder Rift grants Fading Embers to all party members, and guarantees you a Legendary Gem and 3 Runes.
You can buy a Legendary Crest for 300 Eternal Orb (no Daily Limit); or 3000 Platinum (Daily Limit: 1).
HOW TO GET PLATINUM AND ETERNAL ORBS?
Platinum can be obtained from three sources:
The 12th Bounty rewards you a treasure chest that contains 150 Platinum. In a 28 days cycle, you can earn 4200+ Platinum per month if you complete all 12 Bounties daily.
The daily Kill of the Day reward for the week might be source of Platinum. Depends how often these are on rotation. In the rotation shown below: That's 10,000 Platinum in one week.
The less attractive route to obtaining Platinum is the in-game shop -- for Eternal Orb.
Eternal Orb can be purchased for real money. The UI for purchasing Eternal Orb is not currently available in Diablo Immortal technical alpha.
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