Here's a few for the labyrinth family:
Endless Labyrinth
Spell, field
Effect: If there is a face-up "
Labyrinth Wall" or
Shifting Labyrinth" on your side of the field, this card cannot be destroyed or removed. As long as this card is face-up on the field, monsters summoned (including flip summoned) or special summoned cannot attack for a number of turns equal to their star levels. Monsters with "Labyrinth" in their name" or are named "Dungeon Worm" are unaffected.
Rarity: Rare or Super Rare
Limit:
Shifting Labyrinth
Earth/rock/6/0/3000
Effect: IF there is a face-up "Endless Labyrinth" on the field, you can special summon this card without tribute. As long as this card is face-up on your side of the field, your opponent's monsters cannot attack monsters on your side of the field are LV 5 or lower.
Rarity: Rare or common
Limit: none
Sentry
Labyrinth Tank
Dark/Machine/7/2400/2400
Effect: When this card attacks with an ATK that is higher than the DEF of your opponent's Defense Position monster, inflict the difference as Battle Damage to your opponent's Life Points. If there is a face-up card with Labyrinth is its name on the field, you can tribute that monster to tribute summon the monster with just one tribute.
Rarity: Rare
Limit: none
Now for a few more machines:
X- Cannon
Light/Machine/4/1800/1500
Effect: This card's name is treated as "
X-Head Cannon". When this card is successfully Normal Summoned, move 1 "
Y-Dragon Head" and 1 "
Z-Metal Tank" to from your deck to your hand. The deck is then shuffled.
Rarity: Common
Limit: none
Reconfigured Attacker Bugroth
Earth/Machine/4/1500/1000
Effect: If "Umi" is on the field, this monster is treated as a WATER Aqua-type monster card with an ATK of 1800 and a DEF of 1300.
Rarity: Common
Limit: None
Bombardment Wolf
Fire/Machine/4/1200/1400
Effect: Tribute this monster card to destroy all monsters on your opponent's side of the field with an ATK higher than this monster.
Rarity: Rare
Limit: 2 or none
Rocket Punch
Spell, Equip
Effect: This card can only be equipped to "
Machine King" or "
Perfect Machine King". When a monster equipped with this card destroys a monster as a result of battle, inflict damage to the opponent equal to the ATK of the destroyed monster. When this card leaves play, destroy the equipped monster.
Here a few Fire Emblem-esque spellcaster equips:
Nosferatu
Spell, Equip
Effect: This card cannot only be equipped to a DARK Spellcaster-type Monster. When this a monster equipped with this card battles a WIND, EARTH, FIRE, or WATER monster, increase the equipped monster's ATK and DEF by 500. When this a monster equipped with this card battles a LIGHT monster, decrease the equipped monster's ATK and DEF by 500. When a monster equipped with this card inflicts battle damage to the opponent's Life points, increase your life points by the same amount.
Rarity: Rare or Super Rare
Limit: 2 or none
Luna
Spell, Equip
Effect: This card cannot only be equipped to a DARK Spellcaster-type Monster. When this a monster equipped with this card battles a WIND, EARTH, FIRE, or WATER monster, increase the equipped monster's ATK and DEF by 500. When this a monster equipped with this card battles a LIGHT monster, decrease the equipped monster's ATK and DEF by 500. When a monster equipped with this card destroys a monster through battle, regardless of battle position, inflict battle damage to the opponen'ts life points equal to the ATK of the equipped monster and flip three coins. If two are heads, triple the battle damage inflicted.
Rarity: Super Rare
Limit: 2 or 1
Eclispe
Spell, Equip
Effect: This card cannot only be equipped to a DARK Spellcaster-type Monster. When this a monster equipped with this card battles a WIND, EARTH, FIRE, or WATER monster, increase the equipped monster's ATK and DEF by 500. When this a monster equipped with this card battles a LIGHT monster, decrease the equipped monster's ATK and DEF by 500. When a monster equipped with this card inflicts battle damage, flip three coins. If at least two are heads, decrease your opponent's life points by half instead.
Rarity: Super or Ultra Rare
Limit: 2 or 1
Forblaze
Spell, Equip
Effect: This card cannot only be equipped to a Fire Spellcaster-type Monster. When this a monster equipped with this card battles a LIGHT monster, increase the equipped monster's ATK and DEF by 500. When this a monster equipped with this card battles a DARK monster, decrease the equipped monster's ATK and DEF by 500. When this card destroys a monster through battle, flip a coin. If heads, destroy all Spell and trap cards on the opponent's side of the field.
Rarity: Super
Limit: 1 or 2
Fimbulvetr
Spell, Equip
Effect: This card cannot only be equipped to a WATER Spellcaster-type Monster. When this a monster equipped with this card battles a LIGHT monster, increase the equipped monster's ATK and DEF by 500. When this a monster equipped with this card battles a DARK monster, decrease the equipped monster's ATK and DEF by 500. When this card destroys a monster through battle, flip a coin. If heads, your opponent cannot attack next turn and cannot activate face-down cards until their next turn.
Rarity: Super
Limit: 2
Still trying to come up with something for WIND, Earth and a couple for LIGHT (to balance out the dark ones).