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ACR also gave us Brotherhood Headquarters as a color fixer for assassin decks

If it's a land or double-faced card, draw a card

Valakut, the Molten Pinnacle Mono-red decks can get Valakut, the Molten Pinnacle up and running without much trouble, though multicolor decks are going to need Prismatic Omen or some similar effect to make this happen regularly

Fiery Confluence Killing three artifacts is sick, killing small creatures is good, and doming opponents for 6 damage can end games

The relatively low mana cost of Mechtitan Core and its activated ability means the Mechtitan token is likely to be out early and will be able to devastate an opponent