Onetime Waypoints allow players to teleport back to the last place they set one. Placing a waypoint item sets the waypoint; using a waypoint item takes you to the last set waypoint, but also detroys it - you need to place a new waypoint after using one.
A player can only have one active waypoint at any one time.
Recipe:
T = torch
C = core material
[ ] [T] [ ]
[ ] [C] [ ]
[T] [ ] [T]
onetime_waypoint.core- the itemstring for the core material (bu default, a copper ingot)