The iteration of Dragon Strike used against Level 6 Misaka
According to the Railgun mangaka, each Dragon has their own distinct powers
-First Dragon (the one that appears in the fight against Aureolus Izzard): This dragon specializes in decursing and psychological attacks. If it bites you, you could have your memories destroyed.
-Blind Dragon: The blind dragon is a darkness dragon. It too has a powerful psychological effect, so you'll be overcome with terror and confusion when it's nearby.
-One-eyed Cobra Dragon: The one-eyed cobra dragon is a water dragon that summons rainstorms. Its fangs contain the undiluted concept of poison, so anything living it bites will either die or experience a fate worse than death.
-Four-eyed Dragon: The four-eyed dragon has multiple eye powers. It has illusion and hypnotism powers that can blur the line between dreams and reality. It is also a singer with a beautiful voice that can shatter even Shadow Metal.
-Corpse Flame Dragon: The corpse flame dragon is an undead fire dragon with flames erupting from its bones. It damages things with an energy drain that seemingly burns life force itself.
-Ice Crystal Dragon: The ice crystal dragon is as tough and solid as the planet itself and it breaths ice.
-Spear Head Dragon: The spear head dragon releases lightning from its body and fires lasers from its mouth.
The angel dragon's traits and powers are a secret since Mikoto is fighting it in the current Railgun manga arc.
For the Angel Dragon, it’s powers included being able to absorb the energy released from black holes across the universe, fire beams of light that turned whatever they touched to salt, and can fire feathers whose effects on the target vary - if the target consumed the user of the Angel Dragon’s blood prior, their mind controlled. If they didn’t, the feather lethally raises the sodium levels in their body and kills them soon.