Right some ideas... Ye gonna need GUI/JASS experience to make some of these...
Ball of Lightning: Shoots a ball full of electric energy what shoots lightning bolts to nearby enemies (Ball moves in Line movement and shoots lightning bolts to enemies near Lightning ball)
Eruption: Casts spell what makes little earthquake under enemy and shoots him into air by fiercy fire what came out from tiny earthquake (Use impale thing to throw target up)
Aura of Souldrain: Aura what drains nearby enemy hp and giving 20% of drained hp to user with this aura (Passive), (Can drain up to 8 targets)
Aura of Heaven: When nearby friendly unit hp goes under 20% , he is healed by holy light, healing X damage (X sec cooldown per friendly unit in range) (Passive) (Up to 3-5 units)
Comet: Channels huge Comet (Burning rock (Infernal classic summon)) on target area and on impact deals great AoE damage in great radius, stuns victims and makes area burn for little time...
The Void: (Ultimate) Instantly dispels enemy non-hero unit to Void, removing him instantly from reality.
Ward of Flame: Summons ward with rapid flame-thrower like attack what attacks nearby enemies (Use Phoenix fire with low cd and set duration to 0.01)