Havengul Laboratory // Havengul MysteryHow it works & interactions with other cards

What It Does

On its front face, Havengul Laboratory provides colorless mana and an activated ability to Investigate for four mana. Its most important feature is a triggered ability that checks at the beginning of your end step if you sacrificed three or more Clues during that turn. If you met that requirement, the land transforms into its back face, Havengul Mystery.

How It Resolves Step by Step

First, you must sacrifice three Clues during your turn, usually by paying two mana per Clue to draw cards. At the start of your end step, Havengul Laboratory's ability triggers and transforms the land. Once it becomes Havengul Mystery, a new triggered ability goes on the stack allowing you to return a creature card from your graveyard to the battlefield. This creature is now linked to the land; if the creature leaves the battlefield for any reason, the land transforms back into Havengul Laboratory.

Common Mistakes

A common error is forgetting that the 'three Clues' requirement counts all Clues sacrificed during the turn, not just those created by the Laboratory itself. Additionally, remember that the land only transforms back if the specific creature it returned leaves the battlefield. If Havengul Mystery is destroyed while the creature is still out, the link is broken.

When to Play It

Havengul Laboratory is best in slower, grindy decks that value card draw and graveyard recursion. Because it provides colorless mana on the front and black mana on the back, ensure your mana base can handle the lack of colored mana early in the game.

Interaction examples

Solving the Mystery

Clue

If you have three Clue tokens and six mana, you can sacrifice all three to draw three cards. During your end step, Havengul Laboratory will detect these sacrifices and transform into Havengul Mystery, allowing you to reanimate a creature.

Mana Management

Command TowerExotic Orchard

Early in the game, Havengul Laboratory only produces colorless mana. Use stable sources like Command Tower or Exotic Orchard to ensure you have the colored mana needed to activate the Laboratory's Investigate ability or to pay for the Clues.

The End of the Investigation

When Havengul Mystery returns a creature to the battlefield, the land gains a 'link' to it. If your opponent uses a removal spell to exile or destroy that specific creature, the land immediately transforms back into Havengul Laboratory, ready to start the investigation process all over again.