Bridge of Heaven and Earth

Chitenkyou no Jutsu (Bridge of Heaven and Earth)
Ninjutsu (Doton) [Earth]
Rank: 8 (B-Class);
Range: 0 feet;
Effect: Creates a stairway 15-ft. wide, 5 ft. long/level;
Duration: Concentration (up to 1 round/level) plus 3 rounds;
Saving Throws: None;
Chakra Resistance: No;
Chakra Cost: 6.

The user creates a floating bridge, or stairway, from nearby rocks and earth. The stairway begins in front of the user's square and continues for 5 feet per level. It may incline upwards up to 45 degree, or slope downwards at a similar angle. A single 5-ft. square can support a Medium or smaller creature.

Mastery
The second and fourth steps of mastery in this technique increase the width of the
stairway by 10 feet.