Made this a while back and just added to it, there are a few more will add later.
Odekans are shinobi spies
Odekan Nyx, Spy of Darkworld
3/Dark/Fiend/1200/1600
When this card discarded by a card effect look at your opponants hand and all set cards. If this card is discarded by your opponants card effect, send 1 card you opponant controls or is in your opponants hand to the graveyard.
Gravekeeper's Odekan Trapper
4/Darj/Spellcaster/0/2500
FLIP: Select 1 monster on your opponants side of the field. As long this card is face-up on the field, negate the effect of that monster. The selected monster cannot attack or be tributed. Your opponant cannot attack any Odekan other than Gravekeeper's Odekan Trapper.
Odekan Twin Ninja (limit 2)
5/Earth/Warrior/1600/1600
Once per turn Special Summon 1 Odekan Twin Ninja from your hand, deck, or graveyard.
Odekan Ruins
Field Spell
Odekans GAin 300 ATK and DEF.
------------Second Theme------------
Odekan Bow
Equip Spell
Once per turn you may tribute 1 monster you control. The equiped monster can attack directly this turn.
Odekan Archer
3/Earth/Warrior/1000/1200
Monsters with Archer in their name are treated as being equiped with a bow. Pay 1000 lifepoints. During this turn monsters with Archer in their name can attack directly.
Odekan Ninja Training Ground
Continous Spell
Once per turn pay 500 Lifepoints. Special Summon 1 Odekan Ninja Token (1/Wind/Rock/300/300). This tokens cannot be tributed for a Tribute Summon.
Lucky Arrow
Quick-Play Spell
This card can only be activated during the damage step that a monster equiped with a bow attacks directly. Only 2 Arrow cards can be activated per Damage Step. Select and activate 1 of the following effects:
*Draw 2 cards
*Gain Lifepoints equal to twice the damage dealt
Burning Arrow
Quick-Play Spell
This card can only be activated during the damage step that a monster equiped with a bow attacks directly. Only 2 Arrow cards can be activated per Damage Step. Inflict 1000 damge to your opponant.
Multi-Arrow
Quick-Play Spell
This card can only be activated during the damage step that a monster equiped with a bow attacks directly. Only 2 Arrow cards can be activated per Damage Step. Destroy 1 monster on the field.
Explosive Arrow
Quick-Play Spell
This card can only be activated during the damage step that a monster equiped with a bow attacks directly. Only 2 Arrow cards can be activated per Damage Step. Destroy 1 Spell or Trap card on the field.
Speed Arrow
Quick-Play Spell
This card can only be activated during the damage step that a monster equiped with a bow attacks directly. Only 2 Arrow cards can be activated per Damage Step. Discard 1 card. Decrease the attack of the monster that just attacked by 500. It can attack once again in a row.
Odekans are shinobi spies
Odekan Nyx, Spy of Darkworld
3/Dark/Fiend/1200/1600
When this card discarded by a card effect look at your opponants hand and all set cards. If this card is discarded by your opponants card effect, send 1 card you opponant controls or is in your opponants hand to the graveyard.
Gravekeeper's Odekan Trapper
4/Darj/Spellcaster/0/2500
FLIP: Select 1 monster on your opponants side of the field. As long this card is face-up on the field, negate the effect of that monster. The selected monster cannot attack or be tributed. Your opponant cannot attack any Odekan other than Gravekeeper's Odekan Trapper.
Odekan Twin Ninja (limit 2)
5/Earth/Warrior/1600/1600
Once per turn Special Summon 1 Odekan Twin Ninja from your hand, deck, or graveyard.
Odekan Ruins
Field Spell
Odekans GAin 300 ATK and DEF.
------------Second Theme------------
Odekan Bow
Equip Spell
Once per turn you may tribute 1 monster you control. The equiped monster can attack directly this turn.
Odekan Archer
3/Earth/Warrior/1000/1200
Monsters with Archer in their name are treated as being equiped with a bow. Pay 1000 lifepoints. During this turn monsters with Archer in their name can attack directly.
Odekan Ninja Training Ground
Continous Spell
Once per turn pay 500 Lifepoints. Special Summon 1 Odekan Ninja Token (1/Wind/Rock/300/300). This tokens cannot be tributed for a Tribute Summon.
Lucky Arrow
Quick-Play Spell
This card can only be activated during the damage step that a monster equiped with a bow attacks directly. Only 2 Arrow cards can be activated per Damage Step. Select and activate 1 of the following effects:
*Draw 2 cards
*Gain Lifepoints equal to twice the damage dealt
Burning Arrow
Quick-Play Spell
This card can only be activated during the damage step that a monster equiped with a bow attacks directly. Only 2 Arrow cards can be activated per Damage Step. Inflict 1000 damge to your opponant.
Multi-Arrow
Quick-Play Spell
This card can only be activated during the damage step that a monster equiped with a bow attacks directly. Only 2 Arrow cards can be activated per Damage Step. Destroy 1 monster on the field.
Explosive Arrow
Quick-Play Spell
This card can only be activated during the damage step that a monster equiped with a bow attacks directly. Only 2 Arrow cards can be activated per Damage Step. Destroy 1 Spell or Trap card on the field.
Speed Arrow
Quick-Play Spell
This card can only be activated during the damage step that a monster equiped with a bow attacks directly. Only 2 Arrow cards can be activated per Damage Step. Discard 1 card. Decrease the attack of the monster that just attacked by 500. It can attack once again in a row.