Immurement of Seething Scoria
You transplant a section of a great lava lake into the battlefield by shattering this hunk of obsidian.
Consumable 45,000 gp
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.
*: Squares of lava are difficult terrain.
*: When a creature starts its turn in a lava square, you make an attack against that creature: +30 vs. Reflex; on a hit, the target takes 3d8 fire damage, and ongoing 10 fire damage (save ends).
Published in Adventurer's Vault 2, page(s) 89.