The Evermight Staff is a staff.
When used, the player will gain the strength effect. The duration of the strength effect depends on how much health the player is currently missing. E.G. 15 seconds of strength at 75% HP, 30 seconds of strength at 50% HP, with the duration going up to 60 seconds. If the player has 50% or less of their current health, the effect is increased to Strength II, and if the player has 10% or less of their current health, the effect will further increase to Strength III.
Evermight Staff will not work if the player is at full health.
Evermight Staff is currently unobtainable in survival mode. It can still be spawned in via Creative mode, commands, or other third-party methods though.