Guardian: Kaya Asdal
Real life superpower No. 2
The Green Lantern can use his ring to form shapes, like a giant fist with spikes on it to smash into his opponents.
When the Hammerhead Coral senses another coral nearby they change their outer tentacles, making them longer and giving them heaps of powerful stinging cells. These will then battle the neighbouring coral until the coral is dead or out of reach and then the tentacles will reabsorb the stinging cells and return to normal.
Just like the Green Lantern.