Yin + Yang Archtype

[Medivh]

Sol the Yin Warrior
Warrior / Effect
LIGHT
Lv. 4
ATK: 1900
DEF: 200
Once per turn, during your Main Phase, toss a coin (This is not optional). Then, depending on the result, activate one of these effects:
●Heads: This card gains 600 ATK, until the End Phase.
[left]●Tails: Return this card to your deck and Special Summon 1 "Luna the Yang Warrior" from your hand, deck, or graveyard. You cannot Normal Summon or Set the turn you activate this effect. [/left]

[left]Luna the Yang Warrior[/left]
[left]Warrior / Effect[/left]
[left]DARK[/left]
[left]Lv. 4[/left]
[left]ATK: 200[/left]
[left]DEF: 1900[/left]
[left]Once per turn, during your Main Phase, toss a coin (This is not optional). Then, depending on the result, activate one of these effects:[/left]
[left]●Heads: Return this card to your deck and Special Summon 1 "Sol the Yin Warrior" from your hand, deck, or graveyard. You cannot Normal Summon or Set the turn you activate this effect.[/left]
[left]●Tails: This card gains 600 DEF, until the End Phase.[/left]

[left]Shrapnel the Yin Magician [/left]
[left]Spellcaster / Effect[/left]
[left]LIGHT[/left]
[left]Lv. 4 [/left]
[left]ATK: 1500[/left]
[left]DEF: 1000[/left]
[left]Once per turn, during your Main Phase, toss a coin (This is not optional). Then, depending on the result, activate one of these effects:[/left]
[left]●Heads: Discard 1 card from your hand and add 1 Spell card from your deck to your hand. If you cannot, Discard the top card of your deck. [/left]
[left]●Tails: Return this card to your deck and Special Summon 1 "Wound the Yang Magician" from your hand, deck, or graveyard. You cannot Normal Summon or Set the turn you activate this effect. [/left]

[left]Wound the Yang Magician[/left]
[left]Spellcaster / Effect[/left]
[left]DARK[/left]
[left]Lv. 4[/left]
[left]ATK: 1000[/left]
[left]DEF: 1500[/left]
[left]Once per turn, during your Main Phase, toss a coin (This is not optional). Then, depending on the result, activate one of these effects:[/left]
[left]●Heads: Return this card to your deck and Special Summon 1 "Shrapnel the Yin Magician" from your hand, deck, or graveyard. You cannot Normal Summon or Set the turn you activate this effect. [/left]
[left]●Tails: Discard 1 card from your hand and add 1 Trap card from your deck to your hand. If you cannot, discard the bottom card of your deck. [/left]

[left]Yin the Blessed Guardian[/left]
[left]Fairy / Effect[/left]
[left]LIGHT[/left]
[left]Lv. 6[/left]
[left]ATK: 2200[/left]
[left]DEF: 1500[/left]
[left]Once per turn, during your Main Phase, toss a coin (This is not optional). Then, depending on the result, activate one of these effects:[/left]
[left]●Heads: All face-up monsters you control are treated as LIGHT Attribute, until the End Phase.[/left]
[left]●Tails: Return this card to the deck and Special Summon 1 "Yang the Cursed Wanderer" from your hand, deck, or graveyard. You cannot Normal Summon or Set the turn you activate this effect.[/left]

[left]Yang the Cursed Wanderer [/left]
[left]Zombie / Effect[/left]
[left]DARK[/left]
[left]Lv. 6[/left]
[left]ATK: 1500[/left]
[left]DEF: 2200[/left]
[left]Once per turn, during your Main Phase, toss a coin (This is not optional). Then, depending on the result, activate one of these effects:[/left]
[left]●Heads: Return this card to the deck and Special Summon 1 "Yin the Blessed Guardian" from your hand, deck, or graveyard. You cannot Normal Summon or Set the turn you activate this effect.[/left]
[left]●Tails: All face-up monsters you control are treated as DARK Attribute, until the End Phase.[/left]

[left]Yin Yang Barrier! [/left]
[left]Spell / Quickplay[/left]
[left]Activate only when an opponent's monster declares an attack. Discard 1 LIGHT and 1 DARK Attribute monster from your hand; negate the attack.[/left]

[left]Chance Explosion[/left]
[left]Spell / Quickplay [/left]
[left]Activate only when an effect activates that requires you to toss a coin. Call the result of your coin toss. If you call it right, destroy 1 card your opponent controls. If you call it wrong, destroy all cards you control. [/left]

[left]Yin Yang Blast! [/left]
[left]Spell / Normal[/left]
[left]Activate only if you control 1 or more "Yin" monsters and 1 or more "Yang" monsters. Destroy cards your opponent controls equal to the number of "Yin" and "Yang" monsters you control. [/left]

[left]Yin Yang Formation [/left]
[left]Spell / Continuous [/left]
[left]If you do not control 1 or more "Yin" monsters and 1 or more "Yang" monsters, destroy this card. Face-up "Yin" and "Yang" monsters you control cannot be destroyed by battle (Damage calculation is applied normally). [/left]

[Zyzzyzus]

Yang(陽/阳) = Light, Yin(陰/阴) = Darkness, unless you're doing something clever with this, I believe you have it backwards.
The Special Summon effects say that you can't Normal Summon or Set during the same turn, but what if you Normal Summon one of these monsters, since the coin toss is mandatory?

[Medivh]

...Hmm. Hadn't thought about that, maybe I'll remove the clause.

Anyway, an actual review would be nice.