Experiment Twelve

Experiment Twelve was released in early 2024 as part of the Murders at Karlov Manor Commander set, specifically featured in the Deadly Disguise preconstructed deck. The card is designed to capitalize on the set's central mechanics involving the face-down disguise ability, functioning as a payoff for players who strategically flip cards to reveal their true forms. It reflects the overarching narrative of the plane of Ravnica, where the Simic Combine often experiments with bio-engineered life, blending themes of creature evolution with the set's mystery-inspired investigation mechanics.

The card was illustrated by Wisnu Tan, who captured the character's grotesque, modular anatomy typical of Simic projects. The design team focused on providing a repeatable, engine-like presence for decks that utilize morph or disguise effects, allowing for incremental value as the game progresses. Upon its debut, the card was received as a niche but effective utility creature, praised by players for its synergy within its specific archetype rather than as a universal staple of the format.