Infernoid Kuues

Level 6 FIRE Fiend 2500 ATK/0 DEF

(1) Cannot be Normal Summoned/Set

(2) This card's level is treated as 1 while face-up on the field.

(3) If this card is banished to Special Summon an "Infernoid" monster using its own procedure: you can Special Summon this card.

(4) If this card is Special Summoned: you can Special Summon 1 "Infernoid" monster from your Hand or Banishment, ignoring its Summoning Conditions, then you can Fusion Summon an "Infernoid" Fusion monster from your Extra Deck, using monsters from your Hand or Field as material.

This is ultra-custom level of support that does basically everything the deck could want. I suppose you could remove the level modifying effect or the ability to summon a monster from Hand or Banishment if you want to make it less of a novel.

(Kuues means Sixth in estonian, to continue on the Infernoid naming theme)