Start with young frost dragon (offlane)

The young frost dragon can hold lvl 1 on offlane.

It just needs to stay on corner and get pulled.

I usually wait with sending in till the pull unit is near to death. Than there is a nice amount of units that get killed by spell.

You usually need more lvl 1 units, than shown to def the dragon.

After lvl 1:

upgrade the dragon :)

Why would you do that?
Maybe to hold some good auras ;)