Bloomburrow itself is a very two-color centric format, with some slight splashing, so doing more gifting of treasure would have been hard to pull off in such an environment
Old Magic was full of cards with body horror and abstract nightmare creatures, but Niall Silvain somehow manages to be creepier than most of them
When we get competent tools to fight it, like Darksteel Citadel or Crucible of Worlds, they create a lot of value
You can start running out of life really quickly, so include lots of lifegain with cards like Whip of Erebos
Well, the top colorless Commander staples that are also mythic rares are Mana Crypt, Mana Vault, Sword of Feast and Famine, Wurmcoil Engine, and Crucible of Worlds
It works as a silver bullet against certain strategies: Aggro decks hate it because creatures effectively lose haste, it slows down artifact decks that rely on churning out fast mana and rocks