Explosive Trap

Explosive Trap is a common hunter spell card, inducted into the Legacy set, formerly from the Classic set.

Strategy
This is a great card especially against aggro and zoo decks. It's ideally played when the opponent has multiple small minions, so it can be devastating to them, especially if they can't pay around. It's also effective against weakened minions, if you don't have other way to kill them.

In Arena
Explosive Trap is a decent card in Arena. In some games it can clear all your opponent's board, but in most cases they will guess and trade until they have a big board, making this easy to play around.

Lore
is a hunter trap which explodes when approached, dealing Fire damage to the triggering character and applying a damage over time effect to all nearby targets.

Trivia

 * The artwork for this card comes from the World of Warcraft Trading Card Game "Servants of the Betrayer" series, for the card.

Patch changes

 * Moved from Classic to Legacy set.
 * Now activates when your hero is attacked, rather than when a minion damages your hero.
 * Previously: Secret: When a minion damages your hero, deal 2 damage to all enemies. [2 mana, Common]
 * Previously: Secret: When a minion damages your hero, deal 2 damage to all enemies. [2 mana, Common]