A new line of machine-type monsters that a character of mine uses in my fanfiction.
Armored Unit: Soldier
Level 4
Attribute: Light
Type: Machine/Effect
Atk: 1900
Def: 800
Effect: You may discard one card from your hand to activate one of the following effects on either players' turn. 1. Increase the attack power of this monster by 300 points until the end of the damage step. 2. Switch this monster into defense position.
Armored Unit: Sniper
Level: 4
Attribute: Light
Type: Machine/Effect
Atk: 700
Def: 1900
Effect: You may discard one card from your hand to activate the following effect: This monster may attack your opponents' life points directly.
Armored Core Unit: Alpha
Level: 5
Attribute: Light
Type: Machine/ Effect
Atk: 2200
Def: 1500
Effect: You may discard one card from your hand to activate the following effect: Destroy one spell or trap on the field.
Armored Core Unit: Bravo
Level: 5
Attribute: Light
Type: Machine/ Effect
Atk: 2200
Def: 1500
Effect: You may discard one card from your hand to activate the following effect: Destroy one monster on the field, regardless of position.
Armored Core Unit: Charlie
Level: 6
Attribute: Light
Type: Machine/ Effect
Atk: 2400
Def: 1000
Effect: You may discard one card from your hand to activate the following effect: Return up to two Armored Unit or Armored Core Units from the graveyard to your deck. The deck is then shuffled.
Armored Unit: Heavy Arms Soldier
Level: 6
Attribute: Light
Type: Machine/ Effect
Atk: 2500
Def: 500
Effect: This card cannot be Normal Summoned or Flip Summoned. This card cannot be Special Summoned except by the effect of the Spell card: Armor Upgrade. You may discard one card from your hand to activate the following effect: Attack all monsters on your opponents side of the field. If this effect is activated, you cannot attack your opponent's life points directly on that turn.
Armored Unit: Stealth Sniper
Level: 6
Attribute: Light
Type: Machine/ Effect
Attack: 1000
Def: 2500
Effect: This card cannot be Normal Summoned or Flip Summoned. This card cannot be Special Summoned except by the effect of the Spell card: Armor Upgrade. While this card is face-up on the field, no traps can be activated during the battle phase. You may discard one card from your hand to activate the following effect: This card may attack your life points directly, even if in defense position.
Armor Upgrade
Type: Normal Spell
Effect: Tribute 1 Armored Unit: Soldier or 1 Armored Unit: Sniper. Special Summon 1 Armored Unit: Heavy Arms Soldier or 1 Armored Unit: Stealth Sniper from your hand or deck.
Negative Charge
Type: Normal Spell
Effect: Return all cards used for any Armored Unit or Armored Core Units effect to your deck and shuffle. The Armored Unit or Armored Core Units whose effect were used to send the cards to the grave are destroyed.
Engineering
Type: Quick-Spell
Effect: Increase the attack and defense of any Armored Unit by two hundred until the end of the turn in which this card was activated.
Abort Mission
Type: Counter Trap
Effect: Return all Armored Unit and Armored Core Unit cards on the field to the owner's deck. The deck is then shuffled.
Positive Charge
Type: Counter Trap
Effect: For each card discarded for use of an Armored Unit or Armored Core Unit on the field, increase its Attack by 500 until the End Phase this card's effect was activated.
EDIT: Adding one. >_>
Armored Unit: Ammuntion Technician
Level: 3
Type: Machine/ Effect
Attribute: Light
Atk: 900
Def: 800
Effect: You may discard one card from your hand to activate the following effect: Look at one face-down card magic or trap on your opponent's side of the field. If it is a trap, its effect is negated and destroyed. If it is a Spell, return it to its original position. The effect is not activated. This effect can only be used once per turn.