Land Mine is an ability for Cater that requires 6 AP and is available at level 20. It sets a bomb in the ground that can be detonated later.
Land Mine: Power ↑ requires 8 AP and is available after learning Land Mine. It increases the power of Land Mine.
Land Mine: AG ↓ requires 12 AP and is available after learning Land Mine. It reduces the AG cost of Land Mine.
A land mine is an explosive device concealed under or on the ground and designed to destroy or disable enemy targets, ranging from combatants to vehicles and tanks, as they pass over or near it.