The Horn of Truth (Dinosaur Horn in Starfox Adventures) is an ancient item found in a cave in DarkIce Mines, shortly after extending the second bridge by the use of the last three Bridge Cogs. Sabre can only use it on Horn Pads, first to call a SnowHorn to help him through the snowstorm in DarkIce Mines shortly after finding the horn, and in the race of the white SnowHorn after delivering him the SnowHorn Artifact.
After crossing the second bridge, Sabre has to make use of Prince Tricky's Find Command to dig a tunnel to the cave. There Sabre has to use Tricky's Flame Command to light a fire in each of the four holes located in a structure in the middle of the room, after shooting a target on the wall. There is a one minute time limit. If the flames are lit in time, the door to the next room opens. If the time limit is exceeded, the already lit flames go out and the whole thing has to be started over. Behind the door, lies the next challenge, the leap of faith, which is told about by an unknown character:
“Across the ravine you will find our most sacred treasure, the Horn Of Truth. Only a true believer may cross the divide. Believe in your quest Sabre, you must believe.”
The leap of faith's idea is, that there is a bottomless pit filling the whole floor of the room, and Sabre can only cross it by boldly jumping into the pit. After jumping, a bridge of purplish-pink light appears below Sabre, preventing him from falling to the pit. The bridge can then be used to reach the chamber, in which the Horn of Truth rests. Sabre must again utilize Tricky's Flame Command to melt the ice around the horn, after which it can be collected.
- Before the player picks the horn up the PDA says it can summon Snowhorn and Earthwalkers. However the horn is never used to summon an Earthwalker.