Most "Laval" monsters mill and use other "Laval" monsters in the Graveyard. Some, like "Laval Coatl", simply need enough "Lavals" in the Graveyard to work. Others, like "Laval Judgment Lord", banish "Lavals" from the Graveyard for costs. A few, like "Laval Cannon", recycle "Lavals" that have been banished by other effects. Their Synchro Monsters are all based around managing the "Lavals" in the Graveyard with their effects.
All Synchro Monsters require 1 or more non-Tuner FIRE monsters.
Duel Terminal Storyline
The Laval live in a lava zone that's surrounded by Fiery Woodlands. A tribe that's born for battling, all they want to do is fight. For that purpose, they attacked the Gem-Knight repeatedly to start a new conflict. However, the Steelswarms started to take over the surface land. So, the Lavals went to work with the other clans. Forming a temporary union with the Vylon, they obtained new powers to fight back the Steelswarms. Soon, the union finally defeated the invaders, but conflicts haven't lowered yet; the Vylons decided to stop fights between clans by exterminating them completely. Later, the Lavals teamed up with the other clans again in order to stop the Vylon's actions. They fused theirpowers tofight back this order.
After defeating the Vylons, the union disbanded, and the Lavals went working as a new power source for the rituals of the Gishki tribe. Since then, the current fate of Laval tribe is unknown.
Visually, most "Laval" monsters appears to be made out of molten rock or molten lava.
The archetype's name is a corruption of the word "lava", which is similar to how the "Flamvell" archetype was named.
This archetype focuses on setting up its Graveyard to enable several effects from both the field and Graveyard, most easily done via "Molten Conduction Field". Upon completing Graveyard setup, it can unleash a massive swarming speed and overwhelm your opponent with numerous Synchro Monsters.
One can utilize "Rekindling" to revive many "Laval" monsters with 200 DEF, with "Laval Magma Cannoneer" being the ideal non-Tuner due to being Level 4 and able to set up the Graveyard on its own. Some "Flamvell" monsters can be added to the Deck to increase speed, namely "Flamvell Firedog" and "Flamvell Magician". "Firedog" is highly useful because it can search for many of the "Laval" Tuners. With "Rekindling", this Deck is capable of unleashing massive Synchro Monsters such as "Shooting Quasar Dragon" or "Red Nova Dragon" on the first turn. However, this build is not recommended to use in the TCG due to "Rekindling" being limited.