Well, I don't really have any ideas. That's part of the problem. Goblin spells are hard to think up. I'll give it a try.
Maybe, a blink where a zeppelin flies in and picks the hero up and drops it off at a target point.
,or....
A meat hook type projectile that's more like a saw blade that whips around in a circle knocking units backs.
,or....
Monkey wrench: Hero throws a monkey wrench at enemy mechanical units damaging them and making them impossible to repair for 30 seconds.
,or...
Clockwork cyclone: Clockworkers rush forward in a whirlwind disassembling all mechanical units in a straight line.
I don't know. Maybe look at WoW or some of the goblin spells here.
Maybe, a blink where a zeppelin flies in and picks the hero up and drops it off at a target point.
,or....
A meat hook type projectile that's more like a saw blade that whips around in a circle knocking units backs.
,or....
Monkey wrench: Hero throws a monkey wrench at enemy mechanical units damaging them and making them impossible to repair for 30 seconds.
,or...
Clockwork cyclone: Clockworkers rush forward in a whirlwind disassembling all mechanical units in a straight line.
I don't know. Maybe look at WoW or some of the goblin spells here.