TNT

TNT is heavily modifed on the Keepcraft server. Imagine this is a TNT explosion. It's 3x3x3 in size. Red blocks are where the explosion has a 100% chance to affect/change/destroy the block. Yellow blocks are where the explosion has a decent chance, depending on the toughness of the material, to affect the block. Not all blocks are immediately destroyed, but instead degrade with subsequent explosions. This allows defenses to be constructed that will take several explosions to defeat. If your wall is pure smoothstone it should take 4-5 TNT and good placement to defeat it. Most block types (e.g. dirt, sand, glass) will convert directly to air, so it is possible to tunnel underneath. Only bedrock is immune to explosions. Iron doors are as strong as the block underneath them. If you destroy that block, they will pop off as normal.

Block degrading chart
Gold Block ->​ Obsidian   -> Stone        ->   Cobble ->   Gravel    -> Air Iron Block                  Doublestep        Furnace     Everything Diamond Block               Smooth brick      Brick       Else

Ignition
TNT can be ignited in three ways:
 * 1) Flint and tinder. HIGHLY RECOMMENDED. The TNT block will burn for a short time and then explode without the prime animation. Not only is this faster but it also means the TNT does not drop to the ground. It is imperative that you use this mechanic to TNT properly.
 * 2) Activation with redstone. While you cannot actually place the torch permanently in a protected plot, the way Bukkit works is that the redstone still activates the TNT prior to it cancelling the placement. So this actually will work as an ignition method. It will go through the priming animation and fall to the ground.
 * 3) Jumping on it. TNT blocks cannot be jumped on when you're in enemy territory. Doing so will start the ignition sequence (which makes the block an entity you fall through). This is to prevent people from simply building a TNT ramp over walls.

Build Timer
The area 12 blocks around a TNT explosion cannot be built on for 10 minutes. This is to prevent defenders from simply blocking up an incoming raid. You will need to kill the attackers before you can rebuild.

TNT Immunity
Can only be placed in enemy plots during 8pm - 10pm CST.

Notification
Any explosions that occur within a protected plot will alert all defending faction members in the plot with a message directing them to the explosion location. This includes creeper explosions, too, even though creepers do not destroy blocks when they explode.