mjolnir mtg card Mjolnir, Hammer of Thor | Marvel Super Heroes Variants Foil Double all damage equipped creature would deal. Mjolnir, Storm Hammer (Foil-Etched)

Discarding cards is barely a cost, especially with cards like Inti, Seneschal of the Sun and Containment Construct that turn it into card advantage

You dont really want to kill some random Kor Soldier token, but how many triggers of Umezawa's Jitte can you give your opponent

Well, I guess theres probably no small way for Dinosaurs, but I digress

The costs of activated abilities of artifact cards that work in other zones, such as cycling, wont be reduced

Explore gives you a lot of lands, lands let you use eternalize abilities

Outside of affinity, these are just great with cards that want you to have tons of artifacts, like Emry, Lurker of the Loch, Cyberdrive Awakener, or Urza's Saga