Mobius the Frost Monarch

 This monster appears in the artworks of By Order of the Emperor, Inverse Universe, Prideful Roar, March of the Monarchs, Domain of the True Monarchs, Tribute Carnival, Frost Blast of the Monarchs and Magical Mid-Breaker Field.

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This monster has an Mega Monarch form: Mobius the Mega Monarch.

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This monster's name is derived from the Möbius strip.

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This is supported by the fact that this monster is similar in appearance to Escher the Frost Vassal, a monster with a Summoning condition that complements this card's effect, and whose name is derived from M. C. Escher, a graphic artist well-known for his artwork that portrayed impossible objects. A Möbius strip is also known as an impossible object.

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OCG Rulings

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This effect targets 1 to 2 cards on the field.: Effect Monster > Mobius the Frost Monarch: Does the effect of "Mobius the Frost Monarch" target?

The effect is optional, and activates after this card's successful Tribute Summon.

If you choose to activate the effect, you must target at least one Spell/Trap Card.

If "Mobius the Frost Monarch" is Tribute Summoned by the effect of "Ultimate Offering" in the middle of a chain (and is not the last step of the chain to resolve), then you have missed the timing on his effect and you cannot activate his effect to destroy 2 Spell or Trap Cards.: Can you activate the effect of "Mobius the Frost Monarch" when it is Summoned in the middle of a Chain with "Ultimate Offering"?

If "Mobius the Frost Monarch"s effect targets two cards, you can activate "Dragonic Knight"s effect by sending the two targetted Spell/Trap Cards to the Graveyard.: When "Mobius the Frost Monarch" or a similar card targets multiple cards, can "Dragonic Knight"s effect be activated?

When "Sangan" is Tributed to Tribute Summon "Mobius the Frost Monarch" while "Doomcaliber Knight" is on the field, "Sangan" is Chain Link 1 (because it is mandatory) and "Mobius the Frost Monarch" is Chain Link 2 (because it is optional). The effect of "Doomcaliber Knight" will then activate as Chain Link 3. When resolving the effect, "Doomcaliber Knight" will negate the effect of "Mobius the Frost Monarch", and then "Sangan" will resolve normally.: When "Sangan" is Tributed to Tribute Summon "Mobius the Frost Monarch" while "Doomcaliber Knight" is on the field, how do you resolve it?

If you Tribute "Mobius the Frost Monarch" for the Tribute Summon of "The Tyrant Neptune", then after "The Tyrant Neptune" gains the effect of "Mobius the Frost Monarch" it is no longer "When this card is successfully Summoned", so you cannot activate the effect of "Mobius the Frost Monarch

Previously Official Rulings

You select the Spell/Trap Cards when you activate the effect of "Mobius the Frost Monarch".

This effect targets.

If "Level Limit - Area B" is active and "Mobius the Frost Monarch" is successfully Tribute Summoned, "Level Limit - Area B" is a Continuous Spell Card so its effect is applied and the Battle Position of "Mobius the Frost Monarch" is changed to Defense Position. Then you can activate the effect of "Mobius the Frost Monarch".

If "Mobius the Frost Monarch" is Tribute Summoned by the effect of "Ultimate Offering" in the middle of a chain (and is not the last step of the chain to resolve), then you have missed the timing on his effect and you cannot activate his effect to destroy 2 Spell or Trap Cards.

If 1 of the 2 Spell or Trap Cards targeted by the effect of "Mobius the Frost Monarch" is destroyed by some card effect before his effect resolves, the remaining 1 card is still destroyed by his effect.

Mentions in Other Rulings

Stumbling: The effect of "Stumbling" goes on a chain immediately after a monster is Summoned. As a mandatory Trigger Effect, "Stumbling" is always on the chain before optional Trigger Effects ("Mobius the Frost Monarch") or chained Spell & Trap Cards ("Trap Hole").

Judge List Rulings

Pulling the Rug: You can chain "Pulling the Rug" to a "Monarch's" Trigger Effect. If the "Monarch's" effect is optional (like "Mobius the Frost Monarch") and its controller chooses not to activate it, then you can't chain "Pulling the Rug" : ¿Cual es la forma de activar "Pulling the Rug" contra los Monarcas?: Pulling The Rug

"Monarch's" effects activate at the time they are successfully Tribute Summoned. Their effects are Spell Speed 1. If the opponent wants to activate a card like "Bottomless Trap Hole", it will be placed onto the Chain with the "Monarch's" effect. But "Monarchs" don't need to remain on the field to resolve their effects, so destroying them with "Bottomless Trap Hole" will not negate their effect.: Bottomless Trap Hole Vs. Monarchs