Use SET <Trap> choosing from SNARETRAP, FIRETRAP, and ICETRAP.
Traps may be used in combat. After setting a trap, when a monster advances on you, the trap will trigger. Snare traps will cause the monster to be rooted, preventing them from moving (they can still attack if in melee range). Fire trap causes fire damage with a burning DOT. If critical, the fire will cause an explosion, causing burning DOT against all hostile targets. Ice Trap will cause ice damage and slow the target. If critical, it will cause the target to be frozen in a block of ice.
Set Trap has a 30 second cooldown.