In Egyptian culture, an obelisk (Greek: ὀβελίσκος [obeliskos], diminutive of ὀβελός [obelos], "needle") is a tall, narrow, four-sided, tapering monument which ends in a pyramidal top. Ancient obelisks were made of a single piece of stone (a monolith). The term stele (plural: stelae) is generally used for other monumental standings of inscribed, sculpted stones not of classic obelisk form.
Obelisks are a special type of religious monument from Ancient Egypt. The shape of an Obelisk is in the likeness of a singular ray of sunlight piercing the clouds whilst hitting the Earth at a 90-degree angle. The God of Obelisk (the Duel Monster) is most likely a far more ferocious-looking version of Geb (the Egyptian god of Earth, soil, and stone), or he is one of the even more ancient gods of Egypt (likely from before the demonetization of Seth/Set). He might be a god of aging, time and/or impermanence (which would be represented by how an obelisk crumbles over time).
This is the only "Egyptian God Card" to have a predetermined ATK and DEF value, as well as an immunity to being targeted.
It is also the only "Egyptian God Card" not based on a dragon.
In the Japanese version of Yu-Gi-Oh! Duel Monsters, the original version of this card, and the other "Egyptian God Cards" are in English, while still using the Japanese name.
In this version, Defense is misspelled as Difence on this, and other "Egyptian God Cards".
Since the "Egyptian God Cards" are the same color as the gods themselves, "Obelisk the Tormentor" is the only blue-colored card that is not a Ritual Monster. Note that its blue is darker than Ritual Monsters'.
The Effect Monster version of this card is one of the few cards in the game that does not have an 8-digit input code in the bottom left corner and no border around the photo.