BEWD, DM, and Red-Eyes all got support--Tri-Horned Dragon deserves it too!

[Synchronized]

001

Tri-Horned Servant
**/DARK
Fiend / Effect
(1) When this card is Normal or Special Summoned: You can add 1 "Tri-Horned Dragon" from your Deck to your hand.  (2) Once, while you control this face-up card: You can Special Summon 1 Level 8 DARK Normal Monster from your hand.  You cannot activate the (2) effect of "Tri-Horned Servant" during the turn you activated the (1) effect of "Tri-Horned Servant".
800/1250

002
Tri-Horned Hatchling
*/DARK
Dragon / Effect
(1) You can Tribute this card: Special Summon 1 Level 8 or higher DARK Normal Monster from your Deck in face-up Defense Position.  (2) If this card is sent to the Graveyard: You can target up to 3 DARK Normal Monsters from your Graveyard; shuffle those targets into the Deck and if you do, draw 2 cards.  You can only activate each effect of "Tri-Horned Hatchling" once per turn.
0/0

003
Valafar, the Tri-Horned Oracle
****/DARK
Spellcaster / Effect
(1) When this card is Normal Summoned: You can Special Summon any number of Level 8 or higher DARK Normal Monsters from your hand, but you lose 1000 Life Points for each monster Summoned this way. (2) While you control this face-up card, any Battle Damage your opponent takes is halved.  (3) Once per turn: You can target 1 Level 8 or higher DARK Normal Monster from your Graveyard; add that target to your hand.
1800/1800

004
Kanan, the Tri-Horned Swordmistress
****/DARK
Warrior / Effect

If you control a "Tri-Horned" monster, you can Special Summon this card (from your hand). (1) Unaffected by the effect(s) of Spell Cards.  (2) Once per turn: You can banish 1 "Tri-Horned" monster from your Graveyard and if you do, add 1 "Tri-Horned" monster from your Deck to your hand.  (3) While you control this face-up card, Level 8 or higher DARK Normal Monsters you control cannot be targeted by card effects.
1400/1400

005
Tri-Horned Blade Slash Dragon
********/DARK
Dragon / Effect
Cannot be Normal Summoned or Set.  Must first be Special Summoned by sending 1 "Tri-Horned Dragon" from your hand or your side of the field to the Graveyard.  (1) Unaffected by other monsters' effect(s).  (2) When this card attacks or is attacked, your opponent cannot activate card effects until the end of the Damage Step.  (3) If this card destroys a monster by battle: You can Special Summon 1 Level 8 or higher DARK Normal Monster from your hand, Graveyard, or banished zone.  (4) If this card is sent from the field to the Graveyard: Draw 1 card.  You can only use the (3) effect of Tri-Horned Blade Slash Dragon" once per turn.
2850/2350

006
Relic of the Tri-Horned Dragon
Normal Spell Card
If you control no monsters: You can Special Summon 1 "Tri-Horned Dragon" from your Deck in face-up Defense Position.  Destroy it during the End Phase of this turn.  You can only activate 1 "Relic of the Tri-Horned Dragon" per turn.

007
Tri-Horn of Healing
Continuous Spell Card
When this card is activated: You gain 500 Life Points for each "Tri-Horned" card in your Graveyard.  If you control 3 or more "Tri-Horn" Spell Cards with different names: Destroy all "Tri-Horn" cards in your Spell/Trap Card Zone and Special Summon 1 "Tri-Horn" monster from your Deck in face-up Defense Position.

008
Tri-Horn of Destruction
Continuous Spell Card
When this card is activated: Destroy a number of Set cards your opponent controls equal to the number of "Tri-Horn" monsters you control.  If you control 3 or more "Tri-Horn" Spell Cards with different names: Destroy all "Tri-Horn" cards in your Spell/Trap Card Zone and Special Summon 1 "Tri-Horn" monster from your Deck in face-up Defense Position.

009
Tri-Horn of Blessing
Continuous Spell Card
When this card is activated: If you control 2 or more "Tri-Horned" monsters, you can draw 1 card.  If you control 3 or more "Tri-Horn" Spell Cards with different names: Destroy all "Tri-Horn" cards in your Spell/Trap Card Zone and Special Summon 1 "Tri-Horn" monster from your Deck in face-up Defense Position.

010
Horn of Judgment
Counter Trap Card
If you control a "Tri-Horned" monster: Negate the activation and effect of a Spell/Trap Card your opponent controls and if you do, destroy it.  If you control a Level 8 or higher DARK monster, you can activate this card during the turn it was Set.
 

--

 

I had a blast making these.  I always thought Tri-Horned Dragon was a really cool card and I figured I'd try and come up with a fun idea to make some support.  What do you guys think?

 

The idea here was basically to make it so the card itself is playable, but not go over the top like they have with Blue-Eyes White Dragon support (imo.)

[Ultradragon16]

Like the idea but a lot of these cards can actually be used with Cosmo Queen just as easily as Tri-Horned with the Level 8 DARK Normal limitation so I would suggest changing it to just Dark Horned Dragon instead of Level 8 DARK Normal.

 

 

 

003
Valafar, the Tri-Horned Oracle
****/DARK
Spellcaster / Effect
(1) When this card is Normal Summoned: You can Special Summon any number of Level 8 or higher DARK Normal Monsters from your hand, then you lose 1000 LP for each monster Summoned this way. (2) While you control this face-up card, any Battle Damage your opponent takes is halved.  (3) Once per turn: You can target 1 "Tri-Horned Dragon in your Graveyard; add that target to your hand.
1800/1800
 

005
Tri-Horned Blade Slash Dragon
********/DARK
Dragon / Effect
Cannot be Normal Summoned or Set.  Must first be Special Summoned by sending 1 "Tri-Horned Dragon" from your hand or your side of the field to the Graveyard.  (1) Unaffected by other monsters' effect(s).  (2) When this card attacks or is attacked, your opponent cannot activate card effects until the end of the Damage Step.  (3) If this card destroys a monster by battle: You can Special Summon 1 Level 8 or higher DARK Normal Monster from your hand, Graveyard, or banished zone.  (4) If this card is sent from the field to the Graveyard: Draw 1 card.  You can only use the (3) effect of Tri-Horned Blade Slash Dragon" once per turn.
2850/2350

 

Those are just the changes I would make (aside from the whole Level 8 or higher thing).I like the idea and no I'm kind of considering doing something similar with some cards I like.

 

All in all not bad, although I do feel like Horn of Judgement seems like a bit of a watered down Champion's Vigilance but it's also good since it works with all Tri-Horned cards, (Although if you have a Tri-Horned monster and Cosmo Queen on the field you could technically activate it the same turn). Those are just my thoughts, but still a nice set.