1 "Fabled" Tuner + 1 or more non-Tuner monstersOnce per turn, you can discard 1 Fiend-Type monster to draw 1 card.
You can discard Fabled Krus when summoning The Tricky. Fabled Krus' effect will then revive a Fabled Kushano in your graveyard which you can use with The Tricky to Synchro into Fabled Valkyus.
You can keep using Fabled Kushano's effect to retrieve himself so that you will always have a Fiend to discard for Fabled Valkyrus' effect.
Here are some cards that support Fiend monsters. If ever Fabled Valkyrus is destroyed, you can use Doom Shaman or The Puppet Magic of Dark Ruler to revive him.
Call of the Archfiend can also be used to revive Fabled Valkyrus while simultaneously loading your graveyard for effects. Dark Ruler Ha Des negates the effects of monsters destroyed by your Fiend-type monsters.
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