Damage
From Yu-Gi-Oh!
Damage is classed into two basic forms, Battle Damage and Effect Damage.
Life Point costs for cards are not considered damage, so cards like Wall of Revealing Light, Final Countdown, and Premature Burial cannot have their costs re-directed via Barrel Behind the Door or negated by Des Wombat.
[edit] Battle Damage
Battle Damage is the damage to Life Points sustained from a Battle involving 2 monsters on the field or from a monster attacking directly. Also, if a card prevents Battle Damage from being done to monsters, they can't be destroyed in battle, but Battle Damage is applied normally.
[edit] Effect Damage
Effect damage is any damage that is not caused in battle (with the exception of Gravekeeper's Vassal) or is a reduction. Examples of cards that cause effect damage are Poison Mummy, Ookazi, and Ceasefire. Examples of costs that are not effect damage are: Injection Fairy Lily, Life Equalizer, and piercing effects. Key words to look out for in effect damage are "Inflict" and "Direct Damage". If it says "Pay" it is a cost.
