I can help you make custom abilities like those, but it might take me some time to do so (I have a job, go to school, and have a WC3 project of my own).
In the meantime, there's TONS of help available out there in the form of tutorials, examples, and free downloadable systems and spells. Here's some things to get you started:
Free DotA Template
HWS TUTORIALS
HWS SPELLS AND SYSTEMS
<MEMORY LEAKING> IMPORTANT TO KNOW
Just keep in mind as you go about your map-making; there's about a million ways to make a spell, terrain, or system - some ways are more efficient, some ways are glitchy, the list goes on... Just try to do things the way that they work for you and don't worry too much
