antidote =]
No, it can't.His normal summon can't be negated, so Solemn Judgment can't be used there. Also, note Solemn cannot be used against monster effects, so it cannot be used against his activated effects either.
There's a few issues here. - By Order of the Emperor can only be used against a monster effect that 'activates' when the monster is Normal Summoned. Obelisk has no effects that trigger from his own or any other monster's Normal Summon. His protective effects are all continuous, and BOotE cannot be used against his Ignition Effect. - Obelisk's summon cannot be responded to. So even if he did have a Trigger that could activate when he is summoned, BOotE could not chain its effect anyway. - By Order of the Emperor does not target the monster it is used against though. It is being used against the effect (you do not 'target' effects. Divine Wrath could be used against the activated effect of an untargetable monster). So to sum up, By Order of the Emperor cannot be used against Obelisk in any way. Cards like Divine Wrath can be used against Obelisk's Ignition Effect though, they do not target Obelisk.
No monster can chain to a Counter Trap in order to negate the activation. Quick monster effects are spell speed 2, and only Counter Traps can chain to Counter Traps, spell speed 3. So cards like Light and Darkness Dragon and Stardust Dragon can't be used against them. Some monsters can prevent the activation of Counter Traps such as Jinzo. A few others have continuous effects that negate all trap effects. Sky Scourge Invicil is one, when summoned with a Dark monster as tribute.
Flip Effects are Triggered Effects, so if a player flipped a flip effect monster, the effect will trigger as chain link 1. Fiendish Chain can be chained to it, to negate the effect when it tries to resolve. However, if the monster is flipped by an attack, then the trigger happens during the Damage Step. There are restrictions against what you are allowed to activate during the damage step, and Fiendish Chain can't be used here. So it could not stop a Flip Effect at that time.
Yes, both effects will be negated.
An antidote works against the effects of a poisonous substance.
Antidote
A poisonous substances of natural origin produced by an animal is called venom.
Yes. She can't be the target of effects, but that doesn't mean attacks can't be declared against her.
pollution
Many molds are poisonous to mammals.
Many molds are poisonous to mammals.
A psychoactive substance is any substance that effects the emotional and psychological perception in the brain.
A biodegradable substance is a substance that decays into the environment with no harmful effects on the environment.
It's the fog where there are harmful and poisonous effects in the air.
Poisonous air to breath.
The medical term for against a poison is "antidote." An antidote is a substance that can counteract the effects of a poison or toxin in the body, helping to neutralize its harmful effects.