A miniature boneyard, complete with a massive dragon skull in the center, is visible within this crystal sphere.

Power (Consumable): Standard Action. You expend this immurement and change the terrain in a close blast 4 until the end of the encounter. Replace the terrain in the blast with the following terrain and effects.
The area has natural illumination providing dim light.
The squares filled with bones on the ground level are difficult terrain.
The dragon skull platform is 2 squares higher than the ground (Athletics DC 26 to climb).
At the start of your turn, make an attack against each enemy on a bone square: +30 vs. AC; on a hit, the target takes 2d10 + 5 damage, and you slide the target 1 square (as bones shift and move it).

A tree surrounded by cobwebs is visible within this soft, clear sphere.

Power (Consumable): Standard Action. You expend this immurement and change the terrain in a close blast 8 until the end of the encounter. Replace the terrain in the blast with the following terrain and effects.
Squares filled with webs are difficult terrain.
The tree in the center of the area is difficult terrain that costs 2 extra squares to enter and provides cover.
When a creature starts its turn in a web square, you make an attack against that creature: +27 vs. Reflex; on a hit, the target is immobilized until the start of its next turn. On a miss, the target is slowed until the start of its next turn.