Mercurial Thrust is a recurring ability in the franchise. It gives the user an immense priority in turn order, often going first.
Mercurial Thrust has the third highest priority of any ability in the game, trailing behind only Double Up and Kaclang, but attack power is reduced to 80% when used. It is obtained by advancing to rank 5 of the Warrior vocation.
The hero can use Mercurial Thrust as a spear technique after investing 7 skill points into the associated skill. The skill has received an upgrade under Level-5, and now always goes first turning a turn.
This ability is learned with 3 skill points invested into Spear skill, and operates exactly as it did in VIII.