Terrain Element: Collapsing Wall/Cairn/Cliff Face

Here's a simple terrain power progression from Heroic to Paragon to Epic tiers. I started with a collapsable stone wall in a dungeon or amidst the ruins of an ancient keep. A keep, mayhaps, on the Shadowfell. Afterwards,  I progressed the power to knocking over the burial cairns of the ancient fey, as seen in the latest Tomb of Horrors. Lastly, I let the PCs and their enemies jack up their power to over-the-top limits in Epic tier, with collapsing an entire side of a cliff in an avalanche like fashion.

One of the keys to good terrain power progression, and good progression in general throughout the game, from tier to tier is to alter not only the basic stats; attack bonus, damage expression, skill DC, etc., but to also mess around with status effects, area of effect, and anything else you can do to kick it up a notch, such as changing the area of effect in this collapsing series of terrain powers to a wall at Epic tier.



c Collapsing Stone Walls
Single Use Terrain (Level 1)
You find the weak spot in the structure of the walls and give it a good hit.
Single Use
Minor Action; Close blast 2
Check: Dungeoneering DC 15
Attack: +6 vs. Armor Class
Hit: 1d10+6 damage and the target is knocked prone.
Miss: Half damage.
Effect: The zone becomes difficult terrain.

c Fey Burial Cairn
Single Use Terrain (Level 11)
You find the weak spot in the structure of the mound and give it a good hit.
Single Use
Minor Action; Close blast 3
Check: Dungeoneering DC 27
Attack: +16 vs. Armor Class
Hit: 3d6+13 damage and the target is knocked prone.
Miss: Half damage.
Effect: The zone becomes difficult terrain.

a Collapsing Cliff Face
Single Use Terrain (Level 21)
You delicate cliff face is easily shorn off, the jagged rock tumbling below.
Single Use
Minor Action; Area wall 8
Check: Dungeoneering DC 35
Attack: +26 vs. Armor Class
Hit: 3d10+19 damage and the target is knocked prone.
Miss: Half damage.
Effect: The zone becomes difficult terrain.