The longest MTG card name in English is Our Market Research Shows That Players Like Really Long Card Names So We Made this Card to Have the Absolute Longest Card Name Ever Elemental, at 25 words and 141 characters (including spaces).

The Longest Card Names

We've already covered the longest English card name with Our Market Research Shows That Players Like Really Long Card Names So We Made this Card to Have the Absolute Longest Card Name Ever Elemental, a silver-bordered Elemental from Unhinged (UNH) which costs , but there are plenty of other examples of long card names in Magic: The Gathering.

The longest tournament-legal MTG card is Okina, Temple to the Grandfathers, a Legendary Land from Champions of Kamigawa (CHK) which taps for and lets you pay and tap it to give a Legendary Creature +1/+1 until end of turn. With spaces and punctuation, it clocks in at a whopping 33 characters.

The longest unbroken English card name comes from Modern Horizons 2 (MH2), a 3/3 Legendary Human Wizard with a casting cost of or (but only if you've discarded a card this turn) called Asmoranomardicadaistinaculdacar, with a massive 31 characters.

What else you got?

Oviya Pashiri, Sage Lifecrafter from Kaladesh (KLD) is a 1/2 Legendary Human Artificer for . It has two Activated Abilities to make Servos and Constructs and has 31 characters in its name. Sunhome, Fortress of the Legion is a Land from Ravnica (RAV) which taps for and can give a Creature Double Strike for and similarly has 31 characters.

Cards in Other Languages

Magic is regularly printed in six different core languages: English, French, Spanish, German, Japanese, and Italian. For tournament-legal cards, French takes the cake for the longest card names with a massive 44 characters.

Marcheur de chaines de la Halle aux visceres is Gore-House Chainwalker, a 2/1 for with Unleash from Return to Ravnica (RTR).

Souverain des cieux, navire amiral du consul is Skysovereign, Consul Flagship, a Vehicle from Kaladesh (KLD) with Flying, Crew 3, plus it deals 3 damage to a Creature or Planeswalker when it Enters and Attacks. It's a 6/5 while it's a Creature.

Italian and Spanish both take Glacian, Powerstone Engineer (a 3/6 Legendary Human Artificer for with Partner and a Tap Ability to tap X untapped Artifacts you control to look at that many cards, put one in your Hand, and put the rest in the Graveyard) to a competitive 43 and 42 characters respectively with Glacian, Ingegnere della Pietra del Potere and Glacian, ingeniero de las piedras de poder.

What about single words?

German uses a compound-word structure to mash words together, making often surprisingly long words. Look at what happens when they translate the classic Siege-Gang Commander, a 2/2 for which makes three 1/1 Goblin tokens when it Enters and lets you sacrifice Goblins to deal damage.

Belagerungstrupp-Kommandant is an impressive 27 concurrent characters.

While only 18 characters, Spanish manages to make Wurmcoil Engine particularly fun.

Wurmcoil Engine is a 6 mana Artifact Creature from Scars of Mirrodin (SOM) with Deathtouch and Lifelink. When it dies, it leaves behind two 3/3 tokens, one with Lifelink, one with Deathtouch. Motor sierpespiral basically translates to "spiral-blade motor!"

Another Fun One

It's not a card name, but French also decided to connect multiple card types with "et," French for "and." This has some bizarre implications. Consider the card Pet Avengers, a 4/4 for from Marvel Super Heroes (MSH) with Reach and Power-Up.

This Dragon Cat Dog Bird Frog Hero Creature type, once translated, becomes the rather absurd "Creature: dragon et chat et chien et oiseau et grenouille et heros," with a nearly-card-breaking 68 characters!

Final Answer

The longest single card name is Our Market Research Shows That Players Like Really Long Card Names So We Made this Card to Have the Absolute Longest Card Name Ever Elemental. For non-silver-bordered cards, the longest is Okina, Temple to the Grandfathers, and for a single-word name, Asmoranomardicadaistinaculdacar.