Yeah, Denialguy looks like a lot of fun, particularly with Fusion Destiny.

Activate Fusion Destiny: send Malicious and Denier from deck to GY to summon Destiny Hero Dystopia, or Destroy Phoenix Enforcer, or Dangerous, or whatever. Dangerous is a good pick, if you don’t already have another D-Hero in the GY.

Use Malicious’s effect to banish himself and summon another from the deck. Use Denier’s effect to summon himself from GY, and then to put the banished Malicious on top of the deck.

Make Isolde with Malicious and Denier. Banish Malicious to summon the one Denier returned to the deck.

Then you could do something like have Isolde dump 3 equip spells to summon another Denier from the deck. Then the second Denier recycles the Malicious you just banished, and you can make a link 4 monster with Isolde, Denier, and Malicious. And then summon Malicious again by banishing the Malicious you just linked away.

Denier has some real potential with Malicious.