Talk:Midnight/@comment-95.176.177.91-20151014194129/@comment-25555436-20151015030423

Ice is already cold. It is summoned in a specific state. Lava Dust, however, you are basically saying that it is summoned and then changed into a specific state, Obsidian.

With Ice, people summon Ice, instead of summoning water and then freezing it up. With Lava, people would summon Lava, which would then be cooled to form Obsidian. If they didn't need to, if they could summon it as Obsidian inmediately with no need to cool it, it would be called Obsidian Dust instead. And it would also mean people could make Water by using (just) Ice Dust, which hasn't been shown as possible yet.