Obelisk is probably the weakest of the three God Cards, but at the same time he is the easiest to add to an existing deck with little or no modification. Basically he is a big, beat down monster with 4000 Atk./4000 Def. His 4000-attack power can easily be enhanced with cards like Axe of Despair, Mage Power, United We Stand, and Megamorph ( which can give him a life point crushing 8000 attack strength). The only thing you have to do is get him out on the field and let him destroy your opponent´s monsters and life points. Adding him to a
standard beat down deck is easy. Make sure to include cards to destroy your opponent´s traps and magic cards such as Harpie´s Feather Duster and Heavy Storm because you don´t want Obelisk to run into a Magical Cylinder or even an Enchanted Javelin. I would also include 3 copies of Nimble Momonga ( MRL-086) and a Cyber Jar since these cards can give you two or three monsters on the field to use to tribute. Mystic Tomatoes, though they have a low 1400 Attack Strength, can be set in defense mode and when they are killed you can get another dark monster out to be used as a tribute for Obelisk. Also Ritual Summoned monsters would work well in this type of deck, since they allow you to summon an extra monster during your turn. I would suggest using the Masked Beast since it´s the biggest beat down ritual monster available at this time but even Crab Turtle or a smaller Ritual Monster could be used if you´re only going to
turn around and tribute it for Obelisk. If you are going to add Ritual Monsters to any deck you should use at least two copies of Sonic Bird and Senju of the Thousand Hands in order to make the Ritual Summon dynamic work properly. If you are having trouble keeping 3 tribute monsters on the field, you could use a couple copies of Soul Exchange ( SDY-041) in your deck. But remember, if you Soul Exchange one of your opponent´s monsters as a tribute for Obelisk, you must skip your Battle Phase, which means The Tormentor could be destroyed by your opponent during his turn before you even get to attack with him.