I think you'll find a blended scotch made up solely of other single malts is called a vatted malt (if it doesn't contain grain whisky). A blended whisky will often include a grain whisky in the blend which is cheaper to produce than a single malt that uses a single type of malted grain such as...
I've just got through a bottle of this, really really enjoyed it....too much!
edit: Actually, I tell I lie, mine was the 'superstition'! I'll try the 'prophecy' next I think!
SUPERSTITION