Things in the Game: Spider
The spider is the nastiest creature in the game. He is also the most clever.
A spider will immediately begin chasing you from the farthest side of the level, and cannot be easily tricked or trapped.
Spiders will die if an arrow stabs them or a rock rolls over them.
You can also kill a spider by sliding on more than two squares of ice then bumping into the spider. Also when sliding on ice, if you come to rest next to a spider, at the start of the next turn you can bump into the spider to kill it.
They cannot be enticed into water or lava, and they walk easily on ice, so don't count on those helping you. Getting one to walk on cracked ice is possible, however.