All surface and cloud effects can be removed with Tornado.
Water can be created by breaking water barrels or spells such as Rain.
Ooze can be created by breaking ooze barrels, poison effects (mostly from Geomancer spells), or by hitting zombies with piercing or slashing damage.
Ooze Poisons creatures walking on it, which hurts living creatures and heals zombies. Ooze is flammable and will explode and become fire ground if hit by a fire effect or if a Burning object comes in contact with it. Sufficiently large explosions will create smoke clouds. Ooze can be washed away with water.
Fire ground is created by fire effects.
Fire ground causes Burning to objects in contact with it. If doused with water, it will disappear into a steam cloud.
Oil can be created by breaking oil barrels or the Midnight Oil spell.
Lava is distinct from fire ground. It cannot be doused and instantly destroys all non-fire-immune objects and creatures that come into contact with it. Lava can be created using a Lava Core scroll.
Blood is created when living creatures are attacked with Piercing or Slashing damage. The Bleeding status effect also generates blood near the creature. Bleeding can be caused by Bleeding arrows, Voodoo Dolls, or by certain skills:
Blood can be washed away with water or consumed for health with the Leech talent.
Similar to water, blood can be frozen.
Similar to water, blood can be electrified.
Like ooze, poison clouds Poison creatures passing through it. Likewise, poison clouds are flammable and will explode and become fire ground if hit by a fire effect or if a Burning object comes in contact with it. Sufficiently large explosions will create smoke clouds.
When water is applied to a fire surface or fire to a water surface, the surface is destroyed and a steam cloud is created. Steam blocks line-of-sight but not movement.
Explosions caused by igniting oil, ooze, or poison clouds leave behind smoke. Smoke blocks line-of-sight but not movement. Smoke can be removed by Rain.
Rain can be ambient or created with the Rain spell. Rain causes all creatures in the area to be Wet.