They are so deadly, in fact, that one of their number has been in the Top Five for cEDH decks for a long time
As for Conversion Star, it's fine
Illustrated by Jim Nelson Standard Not Legal Alchemy Not Legal Pioneer Not Legal Historic Legal Modern Legal Brawl Legal Legacy Legal Comp
With Norse mythology came dwarves and and a whole lot of treasure, including the legendary dwarf berserker Magda, Brazen Outlaw - who generates a new treasure token every time she or any other dwarf is tapped, and can sacrifice five treasures at once in exchange for searching your deck for any dragon or artifact to immediately put on the battlefield
You can even unleash some spicy infinite token lines with creatures like Scute Swarm in the mix
There are also the Wands, that while having to rely on your opponents decks, can get you spells to deal with enchantments or other permanents as well