Esper Sentinel

Whenever an opponent casts their first noncreature spell each turn, draw a card unless that player pays {X}, where X is this creature's power.

Myrel, Shield of Argive

During your turn, your opponents can't cast spells or activate abilities of artifacts, creatures, or enchantments.
Whenever Myrel attacks, create X 1/1 colorless Soldier artifact creature tokens, where X is the number of Soldiers you control.

Rescue Retriever

Flash
When this creature enters, put a +1/+1 counter on each other Soldier you control.
Prevent all damage that would be dealt to other attacking Soldiers you control.

Arcane Signet

{T}: Add one mana of any color in your commander's color identity.

Valiant Veteran

Other Soldiers you control get +1/+1.
{3}{W}{W}, Exile this card from your graveyard: Put a +1/+1 counter on each Soldier you control.

Field Marshal

Other Soldier creatures get +1/+1 and have first strike. (They deal combat damage before creatures without first strike.)

Captain of the Watch

Vigilance (Attacking doesn't cause this creature to tap.)
Other Soldier creatures you control get +1/+1 and have vigilance.
When this creature enters, create three 1/1 white Soldier creature tokens.

Thalia, Guardian of Thraben

First strike
Noncreature spells cost {1} more to cast.

Sol Ring

Raise the Alarm

Create two 1/1 white Soldier creature tokens.

Conqueror's Pledge

Kicker {6} (You may pay an additional {6} as you cast this spell.)
Create six 1/1 white Kor Soldier creature tokens. If this spell was kicked, create twelve of those tokens instead.

Preeminent Captain

First strike (This creature deals combat damage before creatures without first strike.)
Whenever this creature attacks, you may put a Soldier creature card from your hand onto the battlefield tapped and attacking.

War Falcon

Flying
This creature can't attack unless you control a Knight or a Soldier.

Champion of the Parish

Whenever another Human you control enters, put a +1/+1 counter on this creature.