That part of the effect means you can't use cards in response to his summon, so you can't use cards like Bottomless Trap Hole or Torrential Tribute. It doesn't prevent activations against him later on.
He's untargetable normally too, but the above doesn't mean you can't affect him with a non-targeted effect later on, such as Lightning Vortex. It just means that any card that has to be used specifically in response to a summon, cannot be used against Obelisk's summon.
When Obelisk the Tormentor is Normal Summoned onto the field, the effect of Future Visions does not activate because the lore of Obelisk the Tormentor states "...When this card is Normal Summoned, the effects of Spell, Trap, Monster Card effects cannot be activated..."So in answer to your question: no, Obelisk the Tormentorwill not negate Future Visions' effect because it cannot be activated in the first place.
Obelisk the tormentor is only available as a download.
He can't be targeted, his summon can't be negated, nor can his summon be responded to. But Obelisk can be destroyed by battle, or non-targeting effects such as Dark Hole.
Neither copy of Obelisk the Tormentor (Effect Monster and non-tournament legal) has an official card passcode.
Use cards that can be or can Special Summon. Then, you can used the Special Summoned monsters to Tribute Summon Obelisk the Tormentor. Cards could include:DandylionFiend's SanctuaryJester ConfitMetal Reflect SlimeZoma the Spirit
When Obelisk the Tormentor is Normal Summoned onto the field, the effect of Future Visions does not activate because the lore of Obelisk the Tormentor states "...When this card is Normal Summoned, the effects of Spell, Trap, Monster Card effects cannot be activated..."So in answer to your question: no, Obelisk the Tormentorwill not negate Future Visions' effect because it cannot be activated in the first place.
Obelisk the Tormentor (Effect Monster) is not Ritual Summoned nor does it require a ritual. To summon Obelisk the Tormentor, you must Tribute 3 monsters (it is treated as a Tribute Summon).
Yes. Because Obelisk the Tormentor is only protected from card effects that do not target, Tribe-Infecting Virus will be able to destroy Obelisk the Tormentor via its effect.
No, Mirror Force cannot target or destroy Obelisk the Tormentor because Obelisk is immune to card effects that target it. Obelisk the Tormentor can only be destroyed by battle.
Obelisk the Tormentor has 4000 ATK.
Obelisk the tormentor is only available as a download.
No. Because Fiendish Chain targets a monster, Obelisk the Tormentor will not be affected by it.
on the show, it is unaffected by card effects and by tributing two other monsters on your field, it's atk becomes infinity until the end phase for the actual card, its unaffected by card effects and if you tribute two monsters you control, all monsters your opponent controls are destroyed and you opponent takes 4000 points of damage for the playable version released in shonen jump, its effect is changed slightly. card effects are not activated when it is summoned, and it cannot be targeted by card effects (it can still be destroyed by effects that do not target, like lighting vortex). you can tribute two monsters you control to destroy all monsters your opponent controls, but obelisk cannot attack during the turn. also, if it is special summoned from the graveyard, it is sent to the graveyard during the end phase.
JUMP-EN037 - Obelisk the Tormentor (Effect Monster). It is not banned or limited.
Judgment Dragon's effect does not target, so it can destroy Obelisk the Tormentor.
There is no "red obelisk the tormentor". There is a TCG-legal version of Obelisk the Tormentor, released in Shonen Jump (see http://yugioh.wikia.com/wiki/Obelisk_the_Tormentor_%28Effect_Monster%29).
He can't be targeted, his summon can't be negated, nor can his summon be responded to. But Obelisk can be destroyed by battle, or non-targeting effects such as Dark Hole.