Nathaniel Cho - Event recursion on a successful fight
Veteran Adventurer is solid all the way down, but doesnt synergise with anything here
Exodia, the Legendary Defender X DARK Level 10 [ SpellcasterEffect ] ATK
You handle these challenges using the combination of an investigator of your choice paired with a (usually) thirty card deck composed of the assets, tricks, and skills your investigator will bring to the table
Hideous Taskmaster I already liked Threaten effects with annihilator, so I was always going to be a fan of Hideous Taskmaster
While the general consensus is that it's fine as it is because mana production of this sort is a green mechanic, some people are still sold on the fact that it makes mana based on the number of enchantments out on your side, which has been done by Serra's Sanctum back in the Urza's Saga expansion