In your upkeep, you get one free impulse effect but cannot wait until a future turn to cast it, but you didn't spend any mana so you should have everything mana wise to cast it
If Esper is the secret police, Jund is the cap-wearing Brooklyn fellows with crowbars

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Here's what those terms mean: Expansion: These are the regular Magic: The Gathering sets, legal in Standard, and released at regular intervals throughout the year
The Tomb of Aclazotz is present if youre willing to go hellbent, though Im not sure how often an artifact/aristocrats deck wants to transition into full-on reanimator, considering the finality counters put a damper on death triggers