The five colors in magic are White, Blue, Black, Red, and Green
It practically requires contorting your mana base around this one card, which gets harder the more colors you add
Ursulas Return focuses on the motives of a powerful Ursula glimmer that was unleashed from the Great Illuminary
We have a multitude of effects that increase our creatures' power and toughness, increasing our deck's aggressiveness, such as Chief of the FoundryChief of the Foundry, Steel OverseerSteel Overseer, and the above mentioned Master of EtheriumMaster of Etherium, each helping to sculpt the ideal environment for the Urza Constructs to frolic and cause mayhem
A mono-black deck won't have access to something like Golgari Grave-Troll, but it can still use Stinkweed Imp and Golgari Thug to give some punch to Songs of the Damned
For the physical collectors, they release alchemy cards, which exclusively appear on the online service and bolster what synergies and card combos can be found when playing digitally