# Lava Crossing

This family of skill acquisition tasks requires crossing a river of lava. The agent can accomplish this by either levitating over it (via a potion of levitation or levitation boots) or freezing it (by zapping the wand of cold or playing the frost horn).

In the simplest version of the task (MiniHack-LavaCross-Levitate-Potion-Inv-v0 and MiniHack-LavaCross-Levitate-Ring-Inv-v0), the agent starts with one of the necessary objects in the inventory. Requiring the agent to pickup the corresponding object first makes the tasks more challenging (MiniHack-LavaCross-Levitate-Potion-PickUp-v0 and MiniHack-LavaCross-Levitate-Ring-PickUp-v0). Most difficult variants of this task group require the agent to cross the lava river using one of the appropriate objects randomly sampled and placed at the random location. In LMiniHack-avaCross-Levitate-v0, one of the objects of levitation is placed on the map, while in the MiniHack-LavaCross-v0 task these include all of the objects for levitation as well as freezing.

Five random instances of the MiniHack-LavaCross-v0 task, where the agent needs to cross the lava using (i) potion of levitation, (ii) ring of levitation, (iii) levitation boots, (iv) frost horn, or (v) wand of cold.

## Reward

The agent receives a reward of +1 for reaching the goal on the other side of the lava river.

Source

## All Environments

Name

Skill

MiniHack-LavaCross-Levitate-Ring-Inv-v0

Inventory

MiniHack-LavaCross-Levitate-Potion-Inv-v0

Inventory

MiniHack-LavaCross-Levitate-Ring-Pickup-v0

PickUp + Inventory

MiniHack-LavaCross-Levitate-Potion-PickUp-v0

PickUp + Inventory

MiniHack-LavaCross-Levitate-v0

PickUp + Inventory

MiniHack-LavaCross-v0

PickUp + Inventory