Buckler

The Nathrezim Buckler is an Item purchasable from Supportive Vestments. It is a powerful shield that imbues the bearer with the strength of heroes past.

Armor Bonus
Gives +2 armor to allied units in a 700 AoE. Lasts 25 seconds on heroes, 30 seconds on units, costs 10 mana, and has a 25 second cooldown.