Welcome to Gaia! ::

I would make a whole archetype, and I will MWahaha.

Name: Lakota: Skin Walker
Attribute: Earth
Type: Fiend
Level: 7
Attack: 2500
Defense: 1400
Effect: This card can only be special summoned by tributing 1 "Lakota" monster on your side of the field, and by sending 2 spell cards from your hand or field. While this card is on the field no cards can be synchro summoned.

Name: Lakota: Ghost Walker
Attribute: Dark
Type: Fiend
Level: 5
Attack: 0
Defense: 0
Effect: When this card is tribute summoned take control of one monster on your opponents side of the field for as long as this card remains face-up on your side of the field. By discarding 1 spell card this card can not be destroyed by battle.

Name: Lakota: Wind Walker
Attribute: Wind
Type: Fairy
Level: 4
Attack: 1700
Defense:1000
Effect: Flip: return one spell card from your graveyard to your deck, then shuffle your deck.

Name: Lakota: Coyote
Attribute: Earth
Type: Beast
Level: 3
Attack: 900
Defense: 1200
Effect: When this card is destroyed as a result of battle and sent to the graveyard add one "Medicine Wheel" from your graveyard to your dhand.

Name: Lakota: Windigo
Attribute: Dark
Type: Fiend
Level: 4
Attack: 1500
Defense: 100
Effect: You can tribute 1 Lakota monster on your side of the field to activate 1 of the following effects depending on its level.
*1-5: draw 1 card.
*6: destroy 2 cards on your opponents side of the field.
*7-8: draw 2 cards.

Name: Lakota: Medicine Man
Attribute: Light
Type: Spellcaster
Level: 6
Attack: 2000
Defense: 2000
Effect: You can discard 1 "Medicine Wheel" to activate one of the following effects.
*Negate a monster effect, trap, or spell card and destroy it.
*Special summon 1 Lakota monster from your graveyard.

Only one "Medicine Wheel" can be discarded per turn.

Name: Lakota: Brave
Attribute: Earth
Type: Warrior
Level: 4
Attack: 1700
Defense: 300
Effect:When this card attacks a defense position and its attack is higher than the defense position monsters defense, inflict the difference as battle damage.

Name: Lakota: Shaman
Attribute:Light
Type:Spellcaster
Level: 4
Attack: 1600
Defense: 500
Effect: By discarding one spell card from your hand you can change the battle position of one card your opponent controls.

Name: Lakota: Great Mother
Attribute: Light
Type: Fairy
Level: 8
Attack: 3000
Defense: 1700
Effect: This card can only be special summoned by removing from play 3 "Medicine Wheels". Increase the attack of all Lakota monsters by 300. No trap cards can be activated during the battle phase.

Name: Medicine Wheel
Attribute: Spell
Type: normal
Level: N/A
Attack: N/A
Defense: N/A
Effect: This card is returned to your deck from the graveyard or removed from play when a Lakota monster is destroyed by the effect of a trap, or magic card.

Name: Maize
Attribute: Spell
Type: Continuous
Level: N/A
Attack: N/A
Defense: N/A
Effect: during your end phase increase your life points by x200 the number of Lakota Monsters you control.

Name: Ghost Dance
Attribute: trap
Type: Counter
Level: N/A
Attack: N/A
Defense N/A
Effect: When your opponent declares an attack take control of the attacking monster until the end phase.

Name: Dream Catcher
Attribute: Spell
Type: Quick-Play
Level: N/A
Attack: N/A
Defense: N/A
Effect: Negate the effect of a spell, or trap that would destroy a Lakota Monster on your side of the field.

Over powered I think, but I like it.