Favorite Ozzy Era Black Sabbath song?

there does not yet exist enough hours in the day or weed for my bong to come to a satisfactory conclusion.....there are at least 10 contenders. i will say that Lord of This World is severely under mentioned when people talk about their best songs.
 
Children of the Grave is such a classic.

As if you couldn't stick "is a classic" after half of the songs from the first six albums and have the statement ring true.

Fucking hell man, I really don't think I can narrow it down, so I'll list a couple that are in contention:

Wheels Of Confusion
Into The Void
Hand Of Doom
Hole In The Sky
Symptom Of The Universe