Poison

"Covers the target area in a sticky toxin, damaging and slowing down troops and buildings. Yet somehow leaves the grass green and healthy. Go figure!"

Summary

 * The Poison is unlockable from the Spell Valley (Arena 5).
 * It is a damage dealing spell that creates a circular area in which Troops and Buildings are inflicted constant damage.
 * Troops inside the Poison's radius have reduced movement and attack speed.

Strategy

 * The Poison can be used effectively to damage both troops and buildings.
 * It can be used to cripple the infamous Spawner strategy, as it slows down building spawn time and damages the Troops that spawn out of the buildings, along with the buildings themselves.
 * All troops from spawners have medium-low health, so the poison should kill them in a fairly short time.
 * The Poison can also effectively support your own units or Crown Towers by reducing the attack speed of enemy units. Its damage over time may even eliminate certain low hitpoint cards such as Goblins.
 * Although the Freeze is usually more effective for this strategy, keep in mind that the Poison also has the advantage of dealing damage over time.
 * There is nothing stopping you from using both Spells in your deck. However, this is unrecommended because it is better to have a larger variety of cards to use.
 * In case of an Overtime, the Poison should not be used as a last resort to kill an Arena Tower. Its slow damage over time can give your opponent a few more seconds of survival, possibly leading to a Draw or Defeat.

Trivia

 * The Poison spell was added to the game on 29/2/16 with the March Update.
 * On 23/3/16, a Balance Update increased its damage by 5%.
 * Its uses similar mechanics for its use in Clash of Clans.
 * Unlike in Clash of Clans, Poison damages buildings too. It also deals a fixed damage per second, unlike in Clash of Clans where it does scaling damage over time.
 * The Poison uses the same deployment and sound animation in Clash of Clans.
 * Even though it says "leaves the grass green", Bone pit does not have grass. But it is unlikely for a player that has poison to be in Bone Pit.

PoisonGift