An Arach casting Spin Web.
Spin Web is a monster skill used by the Giant Spider class monsters. When near death, they will run away from the player while spraying globs of spider silk behind them. These form into small trails of webbing that greatly slow you while walking over them, making it hard to catch up to the fleeing spider.
If you can be delayed long enough for the spider to heal, it will come back and rejoin the fight.
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Damaging Skills
Fire — Apocalypse • Eruption • Fire Arrow • Fireball • Fire Bolt • Fire Hit • Firestorm • Fire Wall • Fissures • Flame Circle • Flaming Skull • Grenade • Hydra • Incinerate • Incineration Nova • Inferno • Meteor • Minefield
Ice — Arctic Blast • Blizzard • Cold Touch • Fire Hit (Cold) • Freezing Charge • Frost Bolt • Frost Blast • Glacial Spike • Hoarfrost • Ice Shards
Poison — Poison Bolt • Poison Breath • Poison Cloud • Poison Globe • Poison Spit • Poison Spray • Sting • Spew
Lightning — Arcing • Discharge • Electric Orb • Lightning • Lightning Arrow • Lightning Globe • Lightning Storm • Red Lightning Hose • Shocking Hit • Spark Defense • Thunderbolt • Thunderstorm
Physical — Bite • Blast Wave • Blow Dart • Charge (Berserk Charge) • Cleave • Corpse Cannon • Corpse Explosion • Crush • Destructive Strike• Divebomb • Grab • Ground Spikes • Ground Tentacle • Leap • Javelin • Leech-life Ball • Pummel • Quake • Quill Dart • Roar • Screech • Slam • Snatch • Spectral Slam • Spine Dart • Stomp • Strike • Swipe • Sweep • Whirlwind
Wind — Cyclone • Gale • Gust • Tornado
Magic — Beam • Blade Beam • Blast • Bomb • Bone Spirit • Cataclysm • Hellish Projectile • Nova • Slow Time • Tide • Torrent • Unholy Bolt • Volley • Wave
Non-damaging Skills
Indirect Attack — Blood Mana • Curses • Mana Rift • Minion Frenzy • Putrify • Spin Web • Stun • Vortex
Spawning — Bone Prison • Festering Appendages • Lay Egg • Minefield • Mystifying Growth • Revive • Summon Minion • Totem
Self-effect — Bone Armor • Burrow • Effigy • Fly • Frenzy • Heal • Shell • Teleport • Vile Effigy