Unless specifically stated otherwise, a tribute (and indeed, any cost) must always be something you control.
Soul Exchange and Lava Golem let you tribute the opponent's monsters. But there is no need for cards like the Wicked Gods to state the tributes must be your own, as that is the default and needs no further explanation.
Cheating is not allowed on Moshi Monsters. To keep your monster healthy, you need to feed it. Different foods have different effects on your monster, so remember to try them all and watch your health meter!
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They are considered effect monsters if they have the /Effect designation in their text box.
No part of Zubaba Knight negates effects but since it destroys the monster at the start of the Damage Step it might mean that some monster effects would be unable to activate. Monsters which trigger when destroyed by battle will not activate because they were destroyed by an effect. Many monsters with effects that happen during or after Damage Calculation will never activate because the damage step will end as soon as it starts.
No, It can only negate effects that DESTROY a card on the field. He also can't negate effects that remove monsters from play. Hope I helped!
No, "Koa'ki Meiru War Arms" cannot use the effects of the monsters equipped to it; it gains half of their ATK only.
Almost all effects that discard will trigger Dark World monsters. But they do not trigger when discarded as a cost.Some cards that will activate them,- Card Destruction- Dark World Lightning- Graceful Charity- Spirit Reaper
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Yes, they are in no way protected from monster effects.
'Monsters' do not have Priority, Players do. With his Priority, assuming nothing has triggered, a turn player has the right to start each chain, with a monster's Ignition or Quick Effects.
No sand attack only effects the opponents accuracy.
No, you cannot use Fusion Substitute Monsters for "Future Fusion". You can, however, use Fusion Substitute Monsters for "Chain Material" as long as those Fusion Substitute Monsters exist on your field or hand. The reason Fusion Substitute Monsters cannot be used from your deck is because they have no substitute ability while in the deck and thus cannot be used as replacements for other Fusion Material Monsters.