In general, a monster's effect can only be used while it is face-up on the field. If it can activate in a different zone, such as hand (Gorz, Emissary of Darkness) graveyard (Necro Gardna) or while banished (Stardust Dragon) then it will say so on the card. This is why a card such as Cyber Dragon cannot freely summon itself from the graveyard every time the condition is correct - it summons from hand.
Evil HERO Infernal Gainer has no such text, therefore the cost of banishing it to activate its effect, can only be performed while it is face-up on the field.
Odin says that if he is destroyed, you may resummon him by removing a Tuner from your graveyard, during that turn's End Phase, ie, the turn in which he was destroyed. If you have no Tuners that turn, then you can't activate this effect, and if you pass that turn's End Phase, then you have passed the time to activate it, so it does not matter to Odin if you get a Tuner in your graveyard after that.
No. It is an Ignition Effect, meaning you may only activate Snipe Hunter's effect during your turn.
Yes they do, as they activate their effect when they are destroyed and sent to the graveyard.
Yes, generally you canBUT there are some cards that doesn't allow the effect to activate if you attack. Example is Chaos Sorcerer.so make sure to read the card text first.
No. Dupe Frog triggers only when send from the Field to the graveyard. Also it is an Optional Trigger and would miss the timing anyway.
Odin says that if he is destroyed, you may resummon him by removing a Tuner from your graveyard, during that turn's End Phase, ie, the turn in which he was destroyed. If you have no Tuners that turn, then you can't activate this effect, and if you pass that turn's End Phase, then you have passed the time to activate it, so it does not matter to Odin if you get a Tuner in your graveyard after that.
As a matter of fact, yes. The end of Anubis does negate Stardust Dragon's effect as long as he is on the field. Since Stardust Dragon's effect activates in the graveyard, and The End of Anubis' effect states "Monster cards that designate a card(s) in the graveyard or activate in the graveyard are negated."
No. Infernity Necromancer has to be on the field to use its effect to special summons other Infernity monsters from the graveyard. Monsters can only special summon themselves from the graveyard if they specifically say they can activate in the graveyard - Plaguespreader Zombie for example. However even if Infernity Necromancer could activate in the graveyard, it is specifically prohibited from targeting a card called Infernity Necromancer anyway.
No. It is an Ignition Effect, meaning you may only activate Snipe Hunter's effect during your turn.
No. Wind-Up Rat's effect is targeted and can't be activated if there's no valid target.
Totem Dragon only has one effect that activates, the one that can special summon itself. If there are other monsters in the graveyard, that are non-Dragon types, then this effect cannot be activated.
As a targetted effect, you have to pick the monster you wish to summon when you activate the effect. If you don't have a valid target in your graveyard, then you cannot activate that effect.
No it does not activate, Neos Wiseman will be sent to the graveyard before it's effect can activate. So you won't receive any Life Points, nor will your opponement lose any.
After Molten Conduction Field resolves, Laval Volcano Handmaiden's trigger condition has been met. Since there's a valid target in the graveyard, she's allowed to activate and target it.
If the card states "...discard to the Graveyard" while Macro Cosmos is active, that effect cannot be activated. If it merely states "...discard...to activate" then the discarded card is removed from play instead and the effect carries out.
No, "Ambulance Rescueroid" will not activate its effect upon being summoned using "Polymerization" because it must be Fusion Summoned by sending the Fusion Materials listed on the card from the field to the GY. The effect of "Ambulance Rescueroid" will only activate when it is Special Summoned from the GY by its own effect.
Yes they do, as they activate their effect when they are destroyed and sent to the graveyard.