I assume it's dragonstone dragon bolts (e) but everyone antifire's so the effect doesn't work all that well.
Sapphire Dragon Bolt (e) - "The opponent's mind is struck, causing them to lose 5% of their current Prayer points, and the player gaining about half of it."
Opal Dragon Bolts (e) - A lightning bolt strikes the opponent, dealing extra damage (Visible Ranged level * 10%, rounded down).
Jade Dragon Bolts (e) - A rock slide tumbles down on the opponent, preventing them from moving for five seconds.
Opponents with higher Agility levels are less likely to be affected.