This package of icy blocks, completely coded by me, are different from the 'shattering' ice blocks! These actually melt when hit by a fireball. This package features a grand total of 13, fully customizable ice blocks. Read the readme for more information and block setups.
It doesn't include graphics, but you can use these.
Update (KevinM): converted to be SA-1 hybrid. Made some small code optimizations. Fixed an issue that made the multi-part blocks not work properly in vertical levels.