Mythril Ore is a Hardmode ore that appears in the world every two out of three Demon Altars or Crimson Altars (note that its equivalent, Orichalcum Ore, may spawn instead) that have been destroyed.
Mythril Ore is found throughout the Cavern layer. It can only be mined by a Cobalt Drill or higher. To craft all Mythril equipment, the player needs to acquire 180 bars, or a total of 720 ore.
- On a small map Mythril spawns below a depth of 600 feet (300 blocks).
- On a medium map Mythril spawns below a depth of 1,750 feet (700 block).
- On a large map Mythril spawns below a depth of 2,000 feet (1,000 blocks).
- On the Mini-map Mythril ore shows up as a light blue, not green.
- 1.2.3: Increased stack limit from 99 to 999.
- 1.1: Introduced.