Maralen of the Mornsong

Bracket

• B1 Exhibition — Not in the same deck as its two-card combo partners: Opposition Agent, Stranglehold, Mindlock Orb
• B2 Core — Not in the same deck as its two-card combo partners: Opposition Agent, Stranglehold, Mindlock Orb
• B3 Upgraded — Not in the same deck as its early two-card combo partners: Opposition Agent, Stranglehold, Mindlock Orb
• B4 Optimized — allowed: No restriction beyond the banned list
• B5 cEDH — allowed: No restriction beyond the banned list

Why

• Nonland tutor, two at most in brackets 1–2 and four in bracket 3 (Lotus Vault house cap)
• Two-card combo with Opposition Agent, Stranglehold, Mindlock Orb (early with Opposition Agent, Stranglehold, Mindlock Orb)

How Lotus Vault estimates a bracket

Bracket: Lotus Vault analysis, with Commander Spellbook flags

Combos

36 known combos, 3 of them two-card.

• Maralen of the Mornsong + Opposition Agent
  Produces: Lock, Players can't draw cards, Exile a card of your choice from an opponent's library on each opponent's turn and you may cast that card
  View on Commander Spellbook
• Maralen of the Mornsong + Stranglehold
  Produces: Opponents can't search libraries, Lock, Players can't draw cards
  View on Commander Spellbook
• Maralen of the Mornsong + Mindlock Orb
  Produces: Players can't search libraries, Lock, Players can't draw cards
  View on Commander Spellbook

Combos: Commander Spellbook

Rulings

• 2008-04-01 · Wizards of the Coast
  Maralen prevents players from drawing cards for any reason, including as a cost, as an effect, and as a result of the “draw a card” turn-based action during the draw step.
• 2008-04-01 · Wizards of the Coast
  While Maralen is on the battlefield, no player can lose the game due to being instructed to draw a card with an empty library.
• 2008-04-01 · Wizards of the Coast
  While Maralen is on the battlefield, a player can’t choose to draw cards (or choose to have another player draw cards) as a spell or ability resolves. For example, if you cast the Development side of Research // Development (“Put a 3/1 red Elemental creature token onto the battlefield unless any opponent lets you draw a card. Repeat this process two more times.”), you’ll put three Elemental tokens onto the battlefield because your opponents can’t “let you draw a card.”
• 2008-04-01 · Wizards of the Coast
  The effect of the triggered ability is mandatory. The life loss isn’t a payment; you’ll lose 3 life even if you have 3 or less life left. Unless your library is empty, you must put a card from your library into your hand.
• 2008-04-01 · Wizards of the Coast
  While Maralen is on the battlefield, replacement effects that instruct a player to do something instead of drawing a card won’t work.
• 2008-04-01 · Wizards of the Coast
  In a Two-Headed Giant game, Maralen’s triggered ability will trigger twice per draw step (once for each player on the active team). Maralen’s controller chooses the order to put the abilities on the stack.

Rulings: Scryfall · Wizards of the Coast