Some Random Ideas

[Medivh]

Blue-Eyes White Knight
Warrior / Effect
LIGHT
Lv. 8
ATK: 3000
DEF: 2500
This card cannot be Normal Summoned or Set. This card can only be Special Summoned by tributing 1 face-up "Blue-Eyes White Dragon" and 1 face-up Warrior-type monster you control. When this card destroys a Dragon-type monster by Battle, it gains 300 ATK.

Red-Eyes B. Knight
Warrior / Effect
DARK
Lv. 7
ATK: 2400
DEF: 2000
This card cannot be Normal Summoned or Set. This card can only be Special Summoned by tributing 1 face-up "Red-Eyes B. Dragon" and 1 face-up Warrior-type monster you control. When this card destroys a Dragon-type monster by Battle, draw 1 card.

Red-Eyed Magician Knight
Warrior / Fusion / Effect
DARK
Lv. 8
ATK: 3200
DEF: 2200
"Red-Eyes B. Knight" + "Dark Magician Knight"
When this card is Fusion Summoned, select 1 card on the field and destroy it. When this card destroys a Dragon-type monster by Battle, draw 1 card for every Level the destroyed monster had.

Sword of the Dragon Knight
Spell / Equip
Equip only to a "Blue-Eyes White Knight", "Red-Eyes B. Knight", or "Red-Eyed Magician Knight". The equipped card gains 500 ATK. When the equipped card would be destroyed, you may destroy this card instead (Damage calculation is applied normally). If the Equipped card is destroyed by Battle, inflict 500 damage to your opponent.