First. If you have a bit of salt and any amount of water - you can turn ALL your water into saltwater. After this, distill it and repeat the process. So, you'll get more salt than you had originally: 1) Put a bit of salt into a water. 2) Now freeze it. Temperature should be from 0 to -40 C. You will get this: 3) Wait some time and all your water will became saltwater.
Second. You can harm an diamonds (which should be invulnerable, yes?). 1) Put a diamond block somewhere. Warp or Anti-Matter are not able to harm it. 2) But if you will put both AM and Warp - you can get something like this (not always): 3) Note: if place warp in pause - you will not get such effect.
Diissaster You know, when you put to destructable elements. It's gonna cause some harm. Yes it's a glitch but your putting two destructive elements is bound to damage anything.