The Master, Multiplied

Bracket

• B1 Exhibition — allowed: No restriction at this bracket
• B2 Core — allowed: No restriction at this bracket
• B3 Upgraded — allowed: No restriction at this bracket
• B4 Optimized — allowed: No restriction beyond the banned list
• B5 cEDH — allowed: No restriction beyond the banned list

Why

• No Game Changer, mass land denial, extra turn, tutor or two-card combo

How Lotus Vault estimates a bracket

Bracket: Lotus Vault analysis, with Commander Spellbook flags

Combos

39 known combos.

• The Master, Multiplied + Legion Loyalty + Combat Celebrant
  Produces: Infinite combat phases, Infinite creature tokens, Infinite creature ETB
  View on Commander Spellbook
• Dragonhawk, Fate's Tempest + Orthion, Hero of Lavabrink + The Master, Multiplied
  Produces: Cast a subset of spells in your library, Near-infinite damage
  View on Commander Spellbook
• The Master, Multiplied + Bloodthirster + Duke Ulder Ravengard
  Produces: Infinite creature ETB, Infinite combat phases, Infinite creature tokens with haste
  View on Commander Spellbook

Combos: Commander Spellbook

Rulings

• 2024-04-12 · Wizards of the Coast
  If, while you control The Master, Multiplied, you also control a token legendary permanent and a single nontoken legendary permanent with the same name, the legend rule will not cause you to put either one into your graveyard.
• 2023-10-13 · Wizards of the Coast
  Unlike other creature types in Magic that are each only one word, the two words "Time Lord" represent a single creature subtype. Time Lord is the only two-word creature type.
• 2023-10-13 · Wizards of the Coast
  Each token copies exactly what was printed on the original creature and nothing else. It doesn't copy whether that creature is tapped or untapped, whether it has any counters on it or Auras and Equipment attached to it, or any non-copy effects that have changed its power, toughness, types, color, and so on.
• 2023-10-13 · Wizards of the Coast
  Any enters-the-battlefield abilities of the copied creature will trigger when the token enters the battlefield. Any "as [this permanent] enters the battlefield" or "[this permanent] enters the battlefield with" abilities of the copied creature will also work.
• 2023-10-13 · Wizards of the Coast
  If myriad creates more than one token for any given player (due to an effect such as the one Doubling Season creates), you may choose separately for each token whether it's attacking the player or a planeswalker they control.
• 2023-10-13 · Wizards of the Coast
  The token creatures all enter the battlefield at the same time.
• 2023-10-13 · Wizards of the Coast
  If an effect instructs you to choose a creature type, you may choose Time Lord.
• 2023-10-13 · Wizards of the Coast
  The term "defending player" in the myriad rules (or any other ability of an attacking creature) refers to the player the creature with myriad was attacking at the time it became an attacking creature this combat, or the controller of the planeswalker or the protector of the battle the creature was attacking at the time it became an attacking creature this combat.
• 2023-10-13 · Wizards of the Coast
  Notably, the part of myriad that makes you exile the creature tokens at end of combat is a triggered ability. This means that the ability will trigger, but you won't exile the tokens when it resolves. Since the tokens also have myriad, attacking with each of them will cause that myriad ability to trigger, causing the Master to, well . . . multiply.
• 2023-10-13 · Wizards of the Coast
  If the defending player is your only opponent, no tokens are put onto the battlefield.
• 2023-10-13 · Wizards of the Coast
  You choose whether each token is attacking the player or a planeswalker they control as the token is created.
• 2023-10-13 · Wizards of the Coast
  Neither "Time" nor "Lord" are creature types. Some older cards were printed with the subtype "Lord," but all of those cards have updated Oracle card text that removed that type.
• 2023-10-13 · Wizards of the Coast
  Although the tokens enter the battlefield attacking, they were never declared as attackers. Abilities that trigger whenever a creature attacks won't trigger, including the myriad ability of the tokens. If there any costs to have a creature attack, those costs won't apply to the tokens.

Rulings: Scryfall · Wizards of the Coast