Earthstrike

Earthstrike is a trinket that increases melee and ranged attack power for a limited time. This is the physical version of the Talisman of Ephemeral Power.

This item is a quest reward from Champion's Battlegear which starts with Vargus in the Cenarion Hold in Silithus.

Assuming this trinket were activated every cooldown, it would grant an effective: 280 * 20 / 120 = 280 * 1 / 6 = 280 / 6 = 46.66 Attack Power