This thread will be primarily intended for collecting ideas and brainstorming (hah) on environmental interactions you'd like to see in the nearest big update, or fits the general theme but is too large an idea to include soon. Things like abilities that interact with the surroundings in some new way to create hazards or unique situations, behavior you would expect or enjoy seeing from interactions between various combinations of different skills, objects, tiles and creatures, and new/modified objects and items that would fulfill various functions to flesh out the experience. 

Please feel free to chime in regardless of how outlandish or minor the idea is :)

Some to start;

Characters in wet tiles such as the river or in heavy rain being more conductive to electricity. Increased damage or increased range/likelihood to jump between wet targets? *Maybe an additional stun effect?

Water when hit with sufficient enough heat can blast a plume of steam

Lava manipulation abilities that when interacting with water creates obsidian, lights fires on grass and other flammable materials, 

Casting Fire Pillar on top of a tree slowly turns it into the center of a fire tornado

Abilities like Earthquake that disrupt tile formation create cracks in wall tiles, shatters nearby glass and can cause debris to fall if there is a ceiling overhead.

Tiles should have a realistic amount of resistance to force I.E. Dragon Breath seems like it should effectively funnel through a tight alleyway if started inside of one but be directed to the sides if targeted straight at a wall. On the other hand solid and strong enough projectiles should be able to penetrate certain materials with enough strength. Abilities that create blasts should leave progressively more of a crater with debris strewn from the center. This sounds hard lol, here just develop a whole simulated physics system by October :D

Back to basics: Throwable pots, tables and chairs! Other improvised weaponry picked up off the ground or salvaged from destroyed furniture. I'd like to be able to hit something with the leg of a table or chair if the tooltip is going to mention it :P

I'd also like to be able to move furniture around somehow to create obstacles and barricades in a potential desperate situation, and for enemies to surprise me in how they might break through said obstacles.

Ability to drop a torch on flammable surfaces to get a fire going 

Bombs. Bombs. Dynamite acceptable. But bombs.

Some more abilities, some creative, some more stereotypical rpg fantasy, because I just haven't thrown enough words at you yet:

Trail of Fire: Leaves fire path behind player as they walk (hopefully self-explanatory), alternatively

Fire Dash: A charge that leaves a line of fire in its wake (could forget this and have it work as a synergy Between Trail of Fire and Bull Charge/phaseshift/lunge etc)

Ice Cage: Will freeze enemies inside its path and block those outside. Can be knocked down with attacks and slowly melts.

Geomancy: Pull a set of walls towards player, then away from player, damaging enemies in the path. Or maybe pull a wall from a location into the ground and reposition under target, crushing enemy if under ceiling, throwing them into the air and repositioning in random location if outside, dealing damage in either case. Trying to think of some others like these that aren't too obvious for a potential earth/magic based pseudo-category. Generally they're difficult to envision based on how selecting abilities and targets work, is it possible to select multiple targets in a queue or sequence for an ability?

Telekinesis: That sword over there? Mine now. Pull items from a distance towards player, damaging entity if in its path. Partly inspired by D2 and one of my favorite C:DDA synergies, "Magneto" setup of bionics making it possible to magnetically pull metal objects into the player's hand and fire them at enemies with the strength of a gauss rifle. Not sure how something going anywhere near that would fit mechanically but it would be entertaining to throw items not located on the player at enemies somehow. I see issues handling how items stack and players selecting individual items versus the entire pile.

"Support Pillars" that would be in the world building menu section of things, that when destroyed, causes the placement of new terrain. So a person goes into a mine, breaks the pillars crushing whatever is under it (Or being crushed from such).

"Gunpowder barrels" that when set on fire, cause an explosion(Breaking nearby things perhaps).

Environment Spell additions to current spells already ingame.  Such as:

Vines creating plants.
Freezing Ray putting snow or ice inbetween the target and caster.
Fireball burning things on the way as it reaches it's target.
Peircing Arrow shot with the capacity to go *through* some objects, like trees.

Certain terrain causing different effects as well, hiding in a bush to increase one's stealth, being in the water making you slower, swamp slowing you down, "dream lands" terrain (if it existed for instance) could provide benefits for the player, or maybe hostile to their now mortal form. If there was lava, it setting a person on fire if not with the correct fire resistance gear.