Melt Earth (3.5e Invocation)

This ability functions like transmute rock to mud, except you transform it into a pool of partly-cooled lava. Those trapped in it take 1d6 fire damage each round, or 10d6 if submerged hip deep or deeper (as is the case of Large and smaller creatures). This ability may also be reversed to transmute mud to rock, or transmuting lava to rock. It counts as both spells for the effect of counterspelling, changing lava to rock or rock to lava, and for its effects on certain creatures such as golems.