Sangen Furo
Continuous SpellOnce per turn, when a monster is destroyed by battle involving your FIRE Dragon monster: You can target 1 of those destroyed monsters; Special Summon it to your field in Defense Position. During your opponent's End Phase: You can pay 1000 LP, then target 1 "Sangen" Spell/Trap in your GY; Set it, but banish it when it leaves the field. You can only use this effect of "Sangen Furo" once per turn.
Sangen Kaiho
Normal TrapDuring the Main Phase, if all monsters you control are FIRE Dragon monsters (min. 1) and your opponent controls more monsters than you do: End the Main Phase. If 3 or more attacks have been declared this turn: You can banish this card from your GY; draw 1 card, then you can Special Summon any number of "Tenpai Dragon" monsters from your hand. You can only use each effect of "Sangen Kaiho" once per turn.
Sangen Kaimen 
50
Quick-Play SpellApply 1 of these effects, or if you activated this card during the Battle Phase, you can apply any of them, in sequence.
â—Ź Add 1 Level 4 or lower FIRE Dragon monster from your Deck to your hand.
â—Ź Special Summon 1 FIRE Dragon monster from your hand.
You can only activate 1 "Sangen Kaimen" per turn.
Sangen Summoning 100
Field SpellDuring your Main Phase 1, FIRE Dragon monsters you control are unaffected by your opponent's activated effects. During your Main Phase: You can add 1 "Tenpai Dragon" monster from your Deck to your hand, then discard 1 card. You can only use this effect of "Sangen Summoning" once per turn. If this card is destroyed during the Battle Phase: You can target 1 Dragon Synchro Monster you control; double its ATK.