Duel Links players gain Points through participating and dueling in events, so if youre looking for jewels and other items, make sure to take your time and go through any special events that take place
This is quite expensive for a Ninjutsu card, but I think its good enough to make some lists
Red, blue, and green are found in roughly 1% of the sets Collector Boosters, with the yellow variant only distributed as a promotional card at Wizards Play Network Premium Stores

." Abandoned Sarcophagus Abhorrent Oculus Absolver Thrull Abstergo Entertainment Abstract Performance Abyssal Harvester Academy Rector Acorn Harvest Adorned Crocodile Adorned Pouncer Aegis Sculptor Afterlife from the Loam Against All Odds Agatha's Soul Cauldron Agent of Erebos Agent of Kotis Agonizing Remorse Alchemist's Assistant All Hallow's Eve All Suns' Dawn Alms Alms of the Vein Altar of Bhaal Altar of Bhaal Alter Reality Ambush Wolf Amphin Mutineer Anafenza, the Foremost Analyze the Pollen Ancestor's Embrace Ancestral Tribute Ancient Vendetta Angel of Deliverance Angel of Finality Angel of Glory's Rise Angel of Grace Angel of Indemnity Angel of Sanctions Anikthea, Hand of Erebos Animate Graveyard Anointer Priest Antiquities on the Loose Aphemia, the Cacophony Apostle of Purifying Light Appeal // Authority Appeal // Authority Aquatic Alchemist Aquatic Alchemist Arala, Hedron Scaler Arashin Sunshield Araumi of the Dead Tide Arcane Heist Arcane Proxy Archenemy's Charm Archfiend of Sorrows Archfiend of Spite Archfiend's Vessel Archive Haunt Archmage's Newt Archon of Justice Ardyn, the Usurper Armored Scrapgorger Army of the Damned Arrogant Wurm Artful Dodge Artificer's Dragon Ascend from Avernus Ascendant Dustspeaker Ashiok, Dream Render Ashnod's Harvester Ashnod, Flesh Mechanist

Gold Gold is the free-to-play currency that players earn just by playing MTG Arena
Tip: You can easily distinguish tradable and non-tradable items by checking if they have a lock icon