Shadowstep

The Shadowstep Catalyst is an item that will teleport the player a maximum of 25 blocks. This is done by right clicking and holding. The longer it is held, the further it will teleport the player (up to the maximum). A noise is played when it can successfully teleport the player to the block under the cursor. Comes flush with particles and a shiny texture.

Refer to the MinecraftForum post for more in depth information.

Takes damage when used. Durability of 100, max range step uses 5 durability, that is 20 max range steps per full durabilty. Regains ~30% of its durability at night (unaffected by light level). No crafting recipe, found in loot chests. Most commonly in Nether Fortresses, Strongholds, Dungeons, Pyramids, and less commonly in Mineshafts.