Water

Water itself is a standard block that can be placed by the command /water. It is a static block, contrary to its Minecraft 1.0 counterpart, and will not spread.

Active (Cold) Water
Active Water and Active Cold Water are types of water blocks.

Properties
The block Active Water appears as itself, and upon placement, it will spread one block downwards and horizontally until it is barricaded. Active Cold Water does the same, except that it is a killer block and will freeze anyone who steps on it.

Controversy
Active Water was banned during the beginning stages of Minecraft Isles due to frequent lag and physics crashes on Miner Isle from misuse. Surprisingly, Active Cold Water was overlooked, even though it was essentially the same command but more dangerous; it was available for nobles to use, in fact. Both of these block types are now restricted to gods and over, due to the fact that many of the gods can handle themselves with such a dangerous block, and the advanced physics commands which can reverse the damage done by Active Water should the situation call for it.

Properties
The block geyser appears as Active Water, and can be placed by nobles and above. Upon placement, the block will duplicate itself horizontally as well as one block up and down until all available blocks are filled. These properties make geyser by far one of the most destructive commands available at such a low permission level, as there are few safe ways to barricade a geyser block, and it can circumvent most barriers because it spreads both up and down. Additionally, because of the large amounts of block updates that can potentially take place as a result of this block, the server lags. As if that wasn't enough, the block geyser is a killer block which burns anyone who dares step into it with boiling water, melting them. Once the geyser blocks fill up the map, there are almost no remaining safe places to be in the map, causing repeated death and even more server lag. If the geyser blocks are not removed quickly enough, the server may crash.

Controversy
Geyser has generated much controversy since its discovery. Many voted to have the command banned to prevent exploition, but no action was taken. Despite this controversy, some people have found ways to prevent geyser from causing damage by placing it cleverly. Both Crossover Isle and One Isle have geyser blocks surrounded by Air Switch blocks, preventing them from spreading.

Trivia

 * When confronted about why geyser was not disabled yet, God-King Nalinth simply said that "he likes trials."