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The best action to take if you forgot an upkeep trigger is to ask an available judge

For now, heres a Standard option just using Dream Devourer as mana ramp in a color that doesnt have it

Depending on how well they perform, Delney, Streetwise Lookout could easily become the most expensive card in Murders at Karlov Manor

Then when it ETBs, you draw cards equal to your creature count, for just one more mana than Collective Unconscious

If you don't want to use the full walkthrough, you should at least check out our pages on boss battle strategies for all bosses, the best weapons, magic list, and how to change class to the promoted jobs