yugioh exodia dragon deck Complete Custom for This card gains 1000 ATK for each Forbidden One monster in your Graveyard Exodia deck advice : r/YugiohCards

Its ability to put itself on the board in response to another Fire King's destruction lets it open up Rank 4 Xyz plays, including Brotherhood of the Fire Fist - Tiger King

A different kind of transformation has taken place

C Common Dragunity Couse X WIND Level 2 [ DragonTunerEffect ] ATK 1000 DEF 200 Cannot be used as Synchro Material, except for the Synchro Summon of a "Dragunity" monster

Well, this particular variant, despite having the exact same artwork (by aky CG Works), is from a Prize Pack

They have some abilities that Ready their characters, so Mulan Charging Ahead will be very useful Unfortunately, they also have a couple of very effective strategies against your Challenger-focused deck