Ambush league

"Ambush is about risk and reward. Various new types of chests called Strongboxes can be found throughout Wraeclast. These chests are guarded by monsters that ambush the player when they are opened. The ambushing monsters must be slain before the contents of the Strongbox can be claimed."

- Description on the official Path of Exile website

The Ambush league was a four month softcore league. This league introduced Strongboxes.

It started along with the Invasion league on March 5, 2014 and lasted until July 5, 2014. At the end of the league all characters and stashes were moved to Standard league. Characters that died during the four months respawned in Ambush.

Modifier
All areas had

Items
Ambush had nine exclusive base item types (all shared with Invasion) and three exclusive uniques (two of which were shared with Invasion).

Exclusive base item types
The following item types were introduced exclusive to Ambush and Invasion.

Exclusive uniques
The following uniques were shared between Invasion and Ambush.

This unique was specific to Ambush, but was added as a drop to the core game at the league's end.