Jekyll and Hyde: choose which face remains

Dr. Henry Jekyll // Mr. Edward Hyde leads a Grixis (blue/black/red) Commander deck rooted in Strange Case of Dr Jekyll and Mr Hyde. The Serum gives you control over the change: drinking transforms the commander from Jekyll to Hyde or back again, then makes each opponent lose 1 life while you gain 1. The current face matters to the rest of the board, so another dose can change both your attacker and the abilities supporting it.

• THE SERUM: A Serum token is an artifact with a one-mana sacrifice ability that makes you Drink the Serum, activated only as a sorcery. Jekyll creates one at your end step if he is on his Jekyll face.
• TWO FACES: Drinking transforms the commander in either direction and makes each opponent lose 1 life while you gain 1. Mr. Edward Hyde is 6/5 with menace and haste; his combat damage to a player makes that player sacrifice a creature.
• THE WITNESSES: Gabriel John Utterson, the Lawyer draws a card whenever you Drink the Serum. Dr. Hastie Lanyon, the Witness draws two cards on entry and, while you control Hyde, makes each opponent lose 2 life and lets you scry 2 at your upkeep.
• MAINTAIN THE SUPPLY: The Impure Salt creates a Serum token whenever you Drink the Serum. The Full Statement of the Case makes you drink X times and draw X cards.

Transformation is a choice with consequences

Hyde does not automatically return to Jekyll at the end of the turn. Leaving him in play keeps the printed Hyde conditions active, including Richard Enfield, Man About Town's combat-damage draw ability. Returning to Jekyll restores the face that produces a Serum token at your end step. Repeated drinks alternate the faces, so count the transformations if you need to finish a sequence on a particular side.

The First Draught creates a Serum token, makes you drink and draws a card, offering another route to the change besides activating a token. The Ape-Like Fury has indestructible and haste while you control Hyde. This Jekyll and Hyde Magic Proxy deck suits players who enjoy managing a persistent two-state commander, weighing card preparation against the pressure of a more aggressive board.

A 100-card Commander deck plus 4 tokens, with the existing Bracket 4 designation.