The Sentry is a stationary ranged enemy found in Axis Mundi. It attacks by firing a single long-range bullet every few seconds. The bullet is a Resonant projectile, and can be destroyed with a Spin Kick if the player has Echo's Boots. Kicking these bullets can also launch the player to greater heights, allowing easier traversal of dangerous terrain.
In appearance, it is a higher quality version of the Guardbox from the original game.
The Sentry's greatest strength is its range, as it can easily fire at the player from off-screen. However, once the distance is closed, the player can stand on top of the Sentry without harm and attack it from above.
There are two tougher versions of the Sentry called the Defentry and the Entry Preventry.