Wall of thermal oblivion
From Gempunks
 Wall of Thermal Oblivion Legend
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| A nearly transparent sheet appears, noticeable only by the icy chill of the air around it. | |
| Target: An open space you can see within 20 meters | |
| Effect: You create a 20 by 20 meter square sheet of heat annihilation for 3 rounds. Its incredible cold can be felt from 40 meters away. Any creature that passes through it takes 1d6+3 Cold damage, and attacks that pass through it on the way to their targets deal no Heat damage. |
