Impale a Skeleton on a bone spike to shield your Minions while the spike remains, reducing the amount of damage taken from Hits. Taking a Hit that deals damage above a certain threshold will cause that Minion's shield to absorb all damage from that Hit, then explode. The bone spike is itself a Minion, and shields itself. If it dies, shields on your other Minions disappear.
Skewer a Skeleton on a bone spike to send nearby Minions into a frenzy as long as the spike remains, making their skills faster and harder hitting. The bone spike is itself a Minion. If it dies, the effect ends immediately.
Skewer a Skeleton on a bone spike, granting you a powerful Spell damage Buff as long as the spike remains. Does not affect your Minions. The bone spike is itself a Minion. If it dies, the effect ends immediately.