From Resonant Rise Wiki
Name GasCraft
Creator EMasher
Latest Version
Minecraft Version 1.6.4
Forum Emasher's Mods(Forum)
Root Mod Engineer's Toolbox
Modpacks Feed The Beast Horizons
Feed The Beast Horizons: Daybreaker
Feed The Beast Monster
Tech World 2
Yogscast Complete Pack

Gascraft is an addon mod for Engineer's Toolbox, which adds a variety of gases to caves. These gases flow similarly to water, but travel upwards instead of downwards. Like water, they can cause suffocation damage. As of Minecraft version 1.7.10, the mod was merged into Engineer's Toolbox itself and no longer exists separately.