It works on almost the same level as every other 1st turn kill deck.
And I don't think he played 4 Dark Rituals... unless he's a total dumbass. Think about it:
1) Swamp (0 Mana Floating)
2) T, Swamp: Dark Ritual (BBB Floating)
3) B, Dark Ritual (5 X B Floating)
4) B, Dark Ritual (7 X B Floating = 7 mana)
5) 7 X B, Phage the Untouchable
To add another BB (-1+3) would be idiotic. No one in their right mind would do it.
Also, as soon as I get some Dark Rituals I'll be able to pull that off... I got a Phage a while back. Hehehehe...
EDIT: Just to stay on topic...
You opponent is mass producing token creatures (think factory mass production) then throws a Glare of Subdual on the field. I can't block. Or use tap abilities. Ouch.

EDIT 2: Not only that... hehe... but when your opponent has these cards in their hand:
1 Mountain
1 Raging Goblin
2 Myojin of Infinite Rage
2 Blazing Shoal
...
Ever seen a 21/1 Raging Gobling rape someone on the first turn?


