Havengul Laboratory // Havengul Mystery

{T}: Add {C}.
{4}, {T}: Investigate. (Create a colorless Clue artifact token with "{2}, Sacrifice this artifact: Draw a card.")
At the beginning of your end step, if you sacrificed three or more Clues this turn, transform Hawkins National Laboratory.

When this land transforms into The Upside Down, return target creature card from your graveyard to the battlefield.
When the creature put onto the battlefield with The Upside Down leaves the battlefield, transform The Upside Down.
{T}, Pay 1 life: Add {B}.