Actions

Swedish Short-Snout Dragon

From Hayashi Park Potterverse for 5th ed. Dungeons and Dragons (5e)

D&D Equivalent: Blue Dragon

Ancient Swedish Short-Snout Dragon

Gargantuan dragon, lawful evil

Armor Class 
22 (natural armor)
Hit Points 
481 (26d20 + 208)
Speed 
40 ft., burrow 40 ft., fly 80 ft.
STR DEX CON INT WIS CHA
29 (+9) 10 (+0) 27 (+8) 18 (+4) 17 (+3) 21 (+5)
Saving Throws 
Dex +7, Con +15, Wis +10, Cha +12
Skills 
Perception +17, Stealth +7
Damage Immunities 
lightning
Senses  
blindsight 60 ft., darkvision 120 ft., passive Perception 27
Languages 
Common, Draconic
Challenge  
23 (50,000 XP)

Legendary Resistance 
(3/Day). If the dragon fails a saving throw, it can choose to succeed instead.

Actions

Multiattack 
The dragon can use its Frightful Presence. It then makes three attacks: one with its bite and two with its claws.
Bite 
Melee Weapon Attack: +16 to hit, reach 15 ft., one target. Hit: 20 (2d 10 + 9) piercing damage plus 11 (2d 10) lightning damage.
Claw 
Melee Weapon Attack: +16 to hit, reach 10 ft., one target. Hit: 16 (2d6 + 9) slashing damage.
Tail 
Melee Weapon Attack: +16 to hit, reach 20 ft., one target. Hit: 18 (2d8 + 9) bludgeoning damage.
Frightful Presence 
Each creature of the dragon's choice that is within 120 feet of the dragon and aware of it must succeed on a DC 20 Wisdom saving throw or become frightened for 1 minute. A creature can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success. If a creature's saving throw is successful or the effect ends for it, the creature is immune to the dragon's Frightful Presence for the next 24 hours.
Lightning Breath 
(Recharge 5-6). The dragon exhales lightning in a 120-foot line that is 10 feet wide. Each creature in that line must make a DC 23 Dexterity saving throw, taking 88 (16dl0) lightning damage on a failed save, or half as much damage on a successful one.

Legendary Actions

The dragon can take 3 legendary actions, choosing from the options below. Only one legendary action option can be used at a time and only at the end of another creature's turn. The dragon regains spent legendary actions at the start of its turn.

Detect 
The dragon makes a Wisdom (Perception) check.
Tail Attack 
The dragon makes a tail attack.
Wing Attack 
(Costs 2 Actions). The dragon beats its wings. Each creature within 15 feet of the dragon must succeed on a DC 24 Dexterity saving throw or take 16 (2d6 + 9) bludgeoning damage and be knocked prone. The dragon can then fly up to half its flying speed.

Adult Swedish Short-Snout Dragon

Huge dragon , lawful evil

Armor Class 
19 (natural armor)
Hit Points 
225 (18dl2 + 108)
Speed 
40 ft., burrow 30 ft., fly 80 ft.
STR DEX CON INT WIS CHA
25 (+7) 10 (+0) 23 (+6) 16 (+3) 15 (+2) 19 (+4)
Saving Throws 
Dex +5, Con +11, Wis +7, Cha +9
Skills 
Perception +12, Stealth +5
Damage Immunities 
lightning
Senses 
blindsight 60 ft., darkvision 120 ft., passive Perception 22
Languages 
Common, Draconic
Challenge  
16 (15,000 XP)

Legendary Resistance 
(3/Day). If the dragon fails a saving throw, it can choose to succeed instead.

Actions

Multiattack 
The dragon can use its Frightful Presence. It then makes three attacks: one with its bite and two with its claws.
Bite 
Melee Weapon Attack: +12 to hit, reach 10 ft., one target. Hit: 18 (2d 10 + 7) piercing damage plus 5 (Id 10) lightning damage.
Claw 
Melee Weapon Attack: +12 to hit, reach 5 ft., one target. Hit: 14 (2d6 + 7) slashing damage.
Tail 
Melee Weapon Attack: +12 to hit, reach 15 ft., one target. Hit: 16 (2d8 + 7) bludgeoning damage.
Frightful Presence 
Each creature of the dragon's choice that is within 120 feet of the dragon and aware of it must succeed on a DC 17 Wisdom saving throw or become frightened for 1 minute. A creature can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success. If a creature's saving throw is successful or the effect ends for it, the creature is immune to the dragon's Frightful Presence for the next 24 hours.
Lightning Breath 
(Recharge 5-6). The dragon exhales lightning in a 90-foot line that is 5 feet wide. Each creature in that line must make a DC 19 Dexterity saving throw, taking 66 ( 12d 10) lightning damage on a failed save, or half as much damage on a successful one

Legendary Actions

The dragon can take 3 legendary actions, choosing from the options below. Only one legendary action option can be used at a time and only at the end of another creature's turn. The dragon regains spent legendary actions at the start of its turn.

Detect 
The dragon makes a Wisdom (Perception) check.
Tail Attack 
The dragon makes a tail attack.
Wing Attack 
(Costs 2 Actions). The dragon beats its wings. Each creature within 10 feet of the dragon must succeed on a DC 20 Dexterity saving throw or take 14 (2d6 + 7) bludgeoning damage and be knocked prone. The dragon can then fly up to half its flying speed.

Young Swedish Short-Snout Dragon

Large dragon, lawful evil

Armor Class 
18 (natural armor)
Hit Points 
152 (16dl0 + 64)
Speed 
40 ft., burrow 20 ft., fly 80 ft.
STR DEX CON INT WIS CHA
21 (+5) 10 (+0) 19 (+4) 14 (+2) 13 (+1) 17 (+3)
Saving Throws 
Dex +4, Con +8, Wis +5, Cha +7
Skills 
Perception +9, Stealth +4
Damage Immunities 
lightning
Senses 
blindsight 30 ft., darkvision 120 ft., passive Perception 19
Languages 
Common, Draconic
Challenge  
9 (5,000 XP)

Actions

Multiattack 
The dragon makes three attacks: one with its bite and two with its claws.
Bite 
Melee Weapon Attack: +9 to hit, reach 10 ft., one target. Hit: 16 (2dl0 + 5) piercing damage plus 5 (ldlO) lightning damage.
Claw 
Melee Weapon Attack: +9 to hit, reach 5 ft., one target. Hit: 12 (2d6 + 5) slashing damage.
Lightning Breath 
(Recharge 5-6). The dragon exhales lightning in an 60-foot line that is 5 feet wide. Each creature in that line must make a DC 16 Dexterity saving throw, taking 55 (10d10) lightning damage on a failed save, or half as much damage on a successful one.

Swedish Short-Snout Dragon Wyrmling

Medium dragon , lawful evil

Armor Class 
17 (natural armor)
Hit Points 
52 (8d8 + 16)
Speed 
30 ft., burrow 15 ft., fly 60 ft.
STR DEX CON INT WIS CHA
17 (+3) 10 (+0) 15 (+2) 12 (+1) 11 (+0) 15 (+2)
Saving Throws 
Dex +2, Con +4, Wis +2, Cha +4
Skills 
Perception +4, Stealth +2
Damage Immunities 
lightning
Senses  
blindsight 10 ft., darkvision 60 ft., passive Perception 14 Languages Draconic Challenges (700 XP)

Actions

Bite 
Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 8 (ldlO + 3) piercing damage plus 3 (ld6) lightning damage.
Lightning Breath 
(Recharge 5-6). The dragon exhales lightning in a 30-foot line that is 5 feet wide. Each creature in that line must make a DC 12 Dexterity saving throw, taking 22 (4d 10) lightning damage on a failed save, or half as much damage on a successful one.