To summon these spells, you rely on what are called land cards , or mana
You often want many creatures that mutate in the same deck to maximize the synergies, so Souvenir Snatcher doesnt go in just any deck
Because your other creatures are colorless (and because Steel Overseer doesnt target) you can use Modular creatures like Arcbound Ravager to grow this virtually unblockable and untargetable 2/2 into a game-winning threat
When you use Station, and it gets more than 12 charge counters, you may pay one generic and one black mana, tap the card, pay 2 life, and sacrifice a creature, to draw cards equal to the sacrificed creatures power
Risk: condition-sensitive, and PSA 9 supply isn't tiny
Now imagine being able to redirect that spell back to your opponent