This deck is very simple. Tribute on opponents monster for a kaiju, and summon one of your own if you have it in your hand. then use a Mysterune spell to summon a Mysterune fusion monster. Attack the kaiju with the fusion monster to take 3000 damage to activate inferno tempest. Unless your opponent is playing Sky Striker or Eldlich, Inferno tempest should banish most of their deck, and since 3 Necroface have been banished, both players banish an additional 15 cards. Then finally finish mulling your opponent with your other Mysterune quick play spells and Hand Destruction. Called by the grave was added in incase your opponent tries to use hand traps on your draw cards. This decks big weakness is its hard to draw inferno tempest, and this deck is second going, so if you go first you just have to pray you can stay alive for a turn. Also Secret village of the spellcasters completely shuts this deck down. At the end of the day, this has been the best Inferno Tempest mull deck I've played, hope you enjoy!
EDIT: Oh! Don't forget, Mysterune spells skip your next battle phase, meaning you have to summon your Mysterune fusion monster during your battle phase and NOT your main phase, otherwise you can't attack and the combo is ruined.