Crystal Shard

Crystal Shards are geodes seen during the Corborus encounter in Stonecore.

Strategies
Summoned by Corborus' Crystal Barrage effect in Heroic mode, these adds must be AoE'd down before they reach any target. The +25% damage debuff stacks multiple times.

This is also summoned by Crystalspawn Giant found after Corborus, on normal mode, although only one at a time.