Vanguard

Using shields as a Main Weapon Vanguards fight Placing their Lives on the line.
Either by Carrying 2 Small Shields, Using a tower Shield
Using a Shield on your Main and a Weapon on your Off Hand.

Using a Shield as A main weapon Regardless of the Situation,
Having a streamline thought that your responsibility is to Protect.

That is the Role Vanguards Play in Combat

Reinforced Life Force

At level 3 when you to be part of the Vanguards, you are trained to tank, To take in more damage
bolster your health, You take in Healthy living for Taking care of you
means taking care of the ones close to you.

Your Hit die Increases to d12 + Constitution Modifier  + Constitution Modifier + Proficiency Modifier
You also gain Advantage to Constitution saving throws

And Expertise on Survival

Vanguard's Code

At level 3 You can now attack with your Shield and you are proficient with it

Shield Smash: You Swing your Shield with your Dominant Hand
to smack creatures in front of you dealing 1d10 + Str Bludgeoning

at higher levels: Damage increases to 2d10 at level 5, 3d10 at level 7,
4d10 at level 11, and 5d10 at level 15

You can use your Bonus Action to Attack with your Off-Hand weapon
with no proficiency after using this action

Shield Charge:  You brace your self and let the strength of your life force fill your shield
while standing behind it to rocket you forward and charge a up to your movement speed
and heavily smash opponents in front of you. Dealing 1d12 + Strength Bludgeoning

at higher levels: Damage increases to 2d12 at level 5, 3d12 at level 7,
4d12 at level 11, and 5d12 at level 15

You have the option to use your Bonus Action to Attack with your Off-Hand weapon
with no proficiency after using this action.  or  Push harder to attempt to knock your
opponent back 10ft. (DC STR SAVE 10 + Your Proficiency)

Shield Boomerang: You let the strength of your life force fill your shield extending your hand out
You swing your arm with your shield in it and you rocket it in a forward spin and Throw it up to 30/60ft
and heavily smash opponents you aimed at. Dealing 2d8 + Strength Bludgeoning

at higher levels: Damage increases to 3d8 at level 5, 4d8 at level 7,
5d10 at level 11, and 6d12 at level 15

You use your STR on This Ranged Attack instead of DEX


Chained Shield: All those who are not affected by Vanguard Cannot see
the chains that binds you and them, This affects all of those creatures.
You can make this chain restrain these creatures by wrapping your Shield
in these chain driving your shield down the line of chains to restrain them.
taking 1d12 Bludgeoning damage
(DC STR SAVE OF 10+ Your Proficiency + Your Constitution)

on failed save: these creatures gets restrained, and begin to see the Vanguard chain
wrapped around them, The Shield will begin to twist to tighten and they will take
1d4 bludgeoning damage Each turn they are restrained, this 1d4 Damage will in return heal you
and anyone affected by Vanguard. (They can do the same Str Saving throw at the end of their
turn to break free)

If any of them breaks free, this destroys your vanguard and you take d12 Piercing damage
For everyone restrained by Chained Shield.

Vanguard

At 3rd level as a you gain your bread and butter.
Vanguard, this is what you were trained to do,
you were meant to protect the ones you care for

You hold your shield in front of you, you Brace yourself
as your Life force Connects you to the ones you want to Protect

Any Creature up to 2 that you choose within 30ft of you
chains up their Life force and your Life force together.
At Higher Levels: 3 creatures at level 5, 4 creatures with 40ft radius at level 7,
5 creatures with 50ft radius at level 11, and 6 creatures with 60ft radius at level 15.

They will take All damage at half (after calculating their resistance/immunities)
While you take the other Half.
At level 7 You begin to Ignore half of the Damage, as now they will Receive half
while you only suffer 1/4 of the total damage dealt.

While under the effects of Vanguard You lose Half your movement speed,
and anyone you are protecting must remain within your Vanguard Radius to remain
under the effects of Vanguard.

You can Use Vanguard twice per long rest.
At Higher levels, You can use 3 at level 5, and at level 11 You can use Vanguard up to
5 times per long rest.

Reactive Shield

At 7th level and with Vanguard as your Bread and Butter plus your shield has been
acting as your main offense and Defense, your shield can now buff you
and anyone under the effects of Vanguard.

Reflect Shield: When someone attacks you, or anyone protected by
Vanguard with a melee non magical attack, You can use your reaction
to bolster the target with your Life force. Giving them Resistance to 
the attack (Bludgeoning, Piercing, Slashing), Cutting their damage in half
and returning the other half to the attacker.

Defender: When someone attacks you, or anyone protected by
Vanguard with a ranged non magical attack, You can use your reaction
to bolster the target with your Life force. Giving them Resistance to 
the attack (Bludgeoning, Piercing, Slashing), Cutting their damage in half
and returning the other half to the attacker.

Reactive shield allows you to use your reaction up to your Constitution modifier.

Defense of against Mystic Arts

At level 7 by now you as a vanguard have seen one of your weakness.
Any magical attack thrown at you and your party becomes a problem.
You have trained hard to bolster your own Life force to learn how to
deal with these creatures of arcane so you can better protect the ones
you care about.

Arcane Shield: As an action you focus your Life force to Improve your
vanguard. Dispersing Arcane attacks against you, You and everyone
protected by vanguard, Gains an Advantage on all Spell saves you make
against spells casted at you and everyone under Vanguard Protection.
As long as Vanguard is up

Absorption

At 10th level Your Life is precious, you understand fully that not just theirs is important
also your life is important. so you Train, you tried to learn as much as you
can on how to better protect your allies. Acting like a sponge Absorbing
Anything they throw at them.

Absorption: You can use your reaction when someone under the protection
of Vanguard Gets attacked, (any attack) To Absorb all the damage they were
to take (after Resistances) and take it all on you. Freeing them of any damage
they take until their next turn.

You have 3 Absorption charges per long rest.
Increases to 6 at level 15

Greater than Life

At 15th Level You do not have to protect them at all times, some times they have to help
protect you, to protect each other. You have shared your values to your allies.
Together you guys are one Great Vanguard.

Great Vanguard: While Vanguard is Active you can use your Action to
intertwine your Life force and anyone under the protection of Vanguard's
Life force, Sharing all Resistances, and Immunities. Creating one a Life
force Network, allowing touch based spells and buffs to work Aslong
They are connected to Vanguard.

Rising of the Shield Hero

at 18th Level Taking these damage, Protecting every one
to all your precious You are a HERO!, The Shield HERO!

Shield Hero: As an action you are able to regenerate Hit points using your
Hit die mid combat Equal to the amount of your Constitution
and Strength Mod combined.

Hero's Shield: While in Vanguard as a free action You can use Hero's Shield.
At the cost of your HP, You can Heal anyone under the protection
of Vanguard Double the amount equal to the HP you gave up....