EastScape Wikibuilt from the game itself

Ember seeds

Where to find it: The Boneyard (Chandelier Spider; The Stagehand), The Carnival (Pinhead; The Triple; The Fat Lady; 1 more), The Deep Wild (Grim Lich; Rabid Possum), The Thunderhead (Hail Drake), The Trailer Park (Rabid Possum), Cinderville (Cinder Jackal).

“Plant them on your island. They grow the flower that element's ink is brewed from.”

Dropped by

MonsterLevelHow manyChance a killRoll
Cinder Jackal1011–37.4%One of the table
Grim Lich6612.5%Own roll
Chandelier Spider341–20.8%Own roll
The Stagehand321–20.8%Own roll
Pinhead621–20.8%Own roll
The Triple651–20.8%Own roll
The Fat Lady681–20.8%Own roll
The Strongman711–20.8%Own roll
Hail Drake621–20.8%Own roll
Rabid Possum841–20.8%Own roll
Skeleton Guard (deeper)321–20.8%Own roll

Grows

Plant it on your island's plots (Harvesting 25): ready in about 90 minutes, logged in or not.