final boss help.

[Oromish]

yo.
i hate to spam this forum all day long, but
need some more help ... -.-
almost done with my map, and for the final boss i want it to be a fun encounter.
the boss is a dragon.
i don't got many ideas atm, i want it to teleport around in the boss room sometimes.
maybe time based, and after he teleports, use a spell at the nearest unit.
since i suck at making triggers, i'm not sure on how i would make that.

and if you got any other ideas on how to make the boss encounter fun, please tell me.
//Oromish