This is homebrew, submitted by a member of the community.
Adult Blue Dragon
Adult Blue Dragon
Huge dragon, Lawful EvilHuge dragon, Lawful EvilLegendary Resistance (3/Day). If the dragon fails a saving throw, it can choose to succeed instead.
[b]Legendary Resistance (3/Day).[/b] 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: (2d10 + 7) piercing damage plus (1d10)lightning damage.
Claw. Melee Weapon Attack: +12 to hit, reach 5 ft., one target. Hit: (2d6 + 7) slashing damage.
Tail. Melee Weapon Attack: +12 to hit, reach 15 ft., one target. Hit: (2d8 + 7) bludgeoning damage.
Frightful Presence. Each creature of the dragon's choice that is within 120 ft. 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 d6 5-6). The dragon exhales lightning in a 90-foot line that is 5 ft. wide. Each creature in that line must make a DC 19 Dexterity saving throw, taking 66 (12d10) lightning damage on a failed save, or half as much damage on a successful one.
[b]Multiattack.[/b] The dragon can use its Frightful Presence. It then makes three attacks: one with its bite and two with its claws.
[b]Bite.[/b] Melee Weapon Attack: +12 to hit, reach 10 ft., one target. Hit: (2d10 + 7) piercing damage plus (1d10)lightning damage.
[b]Claw.[/b] Melee Weapon Attack: +12 to hit, reach 5 ft., one target. Hit: (2d6 + 7) slashing damage.
[b]Tail.[/b] Melee Weapon Attack: +12 to hit, reach 15 ft., one target. Hit: (2d8 + 7) bludgeoning damage.
[b]Frightful Presence.[/b] Each creature of the dragon's choice that is within 120 ft. 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.
[b]Lightning Breath (Recharge [d6] 5-6).[/b] The dragon exhales lightning in a 90-foot line that is 5 ft. wide. Each creature in that line must make a DC 19 Dexterity saving throw, taking 66 (12d10) lightning damage on a failed save, or half as much damage on a successful one.
Legendary Actions
Adult Blue 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. Adult Blue Dragon regains spent legendary actions at the start of their 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 ft. 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.
Adult Blue 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. Adult Blue Dragon regains spent legendary actions at the start of their turn.
[b]Detect.[/b] The dragon makes a Wisdom (Perception) check.
[b]Tail Attack.[/b] The dragon makes a tail attack.
[b]Wing Attack (Costs 2 Actions).[/b] The dragon beats its wings. Each creature within 10 ft. 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.
Details
Shout outs: Stacey, elijah D. maben, R., bruschkin, Bobby Marr, Vincent Drone, thea musing, Brian Nunziato, Garrett Smith, Matt Yates, Elisa Martinez, Ryan Flagg, Jade Arrowood, yoland katamari, Dave Walker, Rhonda Seiter, Alexa Hobusch, Jonathan Lekse, Katie White, JollyGamer, Tiernan Greenman, Burlyfighter, Gillian Tolbert, David R Abbott, Rick Marsh, Brittany DeNicholas, Phillip Hash, Amanda Kettles, John Trent Dumproff, Lou Bliss, Pythor Sen, Desedent, Michael Isberg, Nat, Thomas Wilhelm, Krueger82, Irate The Pirate, Mark L, Conall Reilly, keith oneal rogers, Cam Largent, Siren, AstroLass, Lizzie, Michael Hamilton, Vedie V, Mylon Schroder, Nathan, Jordan Florez, Robert Rich, Rodney O'Dell, Robin Ellis-Foster, Jess, Lars Yell, Zee Livezey, Kevin, Kerry Melton, Mary Kieser, SallySparrow132, Naomi B, J, Millergendraft, Federica Frezza, Nick Soucy, Ellen Mitchell, Melanie Warga, Jeremiah Walker, Bryan Sheairs, Bryan Kempka, chris wilson, Max Hops, Sarah Holland, Joshua David Maddox, Jennifer Smith, Liz Fontain, Ray Bissonnette, Joe Dalby, Joline Tran, Nicholas Zamora, ShortyMcgibble, Mr. Vinclair, mtnman1979@aol.com, KFB_Patreon, eric sun, Kayleigh Sulin, Dani, Gundar Wez, Nahellion, Ben Pytlik, Nicholas Hanke, bilbens baggo, Stuart, Brysen Packer, Maxwell Mayer, Gannon Dubay, Thobek, Aaron Teupe, Felix Schmäche, XMrMonkyx ., Miss Zilla M, Jordan Brazeal, Kyle Clark, Jake Lane, Adam Ruiz, Phillip P Torchia, Stefan Gottschalk's, Remora Jewel, jeremy baisch, Daniel Edwards, Zealot23, Shane Andrews, Brandon Mußiq, CJMAXP, Dylan Rintoul, KingHavok1217, Mx Charlie, Zachary Burgess-Hicks, Shazear, Steve Rosenlund, Ezzela1891, John Nazario, Gordon Alexander Fallon, Justin Stensgard, Jason Clark, Trey Vickory
Their contribution stands as a beacon of hope for all adventurers!