O'aka, Traveling Merchants most probable home is in saga/summon-heavy decks to grind more value and draw cards
They make sure the deck stays consistent in a strategy where having access to all five colors is the key to keeping the web intact
Each 20-card half-deck is designed to be mixed and matched to make various 40-card starter decks
The overall setting for Warhammer 40,000 includes many of the more typical tropes of fantasy like humans, elves, and orcs fighting each other, big and epic battles, plus aliens and space technology
Filling your field with creatures is one thing, but token creatures tend to be relatively weak compared to the ones that you cast
Then use Spirit Mirror's zero-mana activated ability to destroy that Reflection Creature