Small World - Necromancer Island Expansion

At first no one noticed the small island on the lake - nor paid any attention to the gnarly pretense of a man who drifted onto it, sitting astride a wooden log with a huge grimoire on his lap employing a shovel as his unlikely paddle.
A ghastly green mist soon shrouded the island, wrapping it in a ghostly silence pierced only by a maniacal laughter and some intermittent curses.
Then, one moonlit night, an impossibly crooked tower emerged high above the mist, casting a long and dark shadow on the surrounding land...
The Necromancer had arrived!

Please note that you will need a copy of Small World in order to play this expansion.