Adult Magnetite Dragon

Arcanomagnetic Repulsion. Attacks made against the dragon with ferrous weapons or ammunition have disadvantage. The area within 20ft. of the dragon is difficult terrain for creatures wearing ferrous armor. This trait is only active when the dragon's horns are both intact.                                                                                                                      Legendary resistance (3/day).  If the dragon fails a saving throw, it can choose to succeed instead.                                                                                                  Superconductor. If the dragon takes 5 or more fire damage at a time, it's flying speed is reduced by 30ft. until the end of it's next turn. If it's flying speed is reduced to zero, it immediately falls 100ft., and on it's next turn, it falls another 100ft. on it's next turn.

Multiattack. The dragon makes three attacks: one with it's bite and two with it's claws, or three with it's sword shot.                                                                                                         Bite. +11 to hit, reach 10ft., one target. Hit: 17(2d10 + 6) piercing damage plus 4 (1d8) force damage.                                                                                                                                   Claw. +11 to hit, reach 5ft., one target. Hit: 13 (1d12+6) piercing damage.                          Sword Shot. +11 to hit, reach 50/150ft., one target. Hit:12 (1d12+6) piercing damage.   Breath Weapons (Recharge 5-6). The dragon uses one of these following breath weapons.                                                                                                                                           Storm of Swords. The dragon shoots a torrent of sharp metal objects in a 60ft. cone. Each creature in that area must make a DC18 DEX save or take 45(13d6) damage or taking half on a success.                                                                                                                Repulsion Breath. The dragon exhales repulsion energy in a 30ft. cone. Each creature  in that area must make a  DC18 STR save.  On a failed save, the creature is pushed up to 60ft. away from the dragon. A creature wearing ferrous armor has disadvantage on the save.

Enter the description for how bonus actions work for your monster here.

The dragon can take up to 3 legendary actions,  choosing from the options below. Only one action option can be used at a time at the end of a creature's turn. The dragon regains a legendary action to spend at the start of it's turn.                                                    Detect. The dragon makes a Wisdom (Perception) check.                                                    Sword Shot. The dragon makes a sword shot attack.                                                            Blood Bend (Costs 2 Actions). The dragon exerts it's magnetic control over the iron in foes' blood. Each creature of the dragon's choice that contains blood and is within 10ft. of the dragon must succeed a DC18 STR save or be sent 10ft. and knocked prone. A creature wearing ferrous armor has disadvantage on the save. It can then proceed to fly up to half it's flying speed.

Enter the description for how mythic actions work for your monster here.

Mythic Action Name (Costs # Actions). Enter the description for your mythic action.