Card Rulings:Megamorph


 * "Megamorph" changes the original ATK of the monster it is equipped to.


 * Having multiple "Megamorphs" equipped to a monster is the same as having one.


 * "Megamorph" is always recalculating with every change in Life Points. For example, your "Jirai Gumo" is equipped with "Megamorph" and you have 8000 Life Points compared to your 7000. You declare an attack with "Jirai Gumo" and lose the coin toss, losing 4000 Life Points. Now "Jirai Gumo"’s ATK is doubled before Damage Calculation.


 * When Life Points are equal the equipped monster’s ATK is unchanged.


 * You may equip "Megamorph" to your opponent’s monster, but ‘your Life Points’ refers to the controller of "Megamorph". So if you have more Life Points than your opponent, your opponent’s monster equipped with "Megamorph" has its ATK halved.

Mentions in Other Rulings

 * [Re: Adhesion Trap Hole] If a monster affected by "Adhesion Trap Hole" is then equipped with "Megamorph", only "Megamorph"'s effect applies.


 * [Re: Amazoness Spellcaster] If you switch ATKs with "Amazoness Spellcaster", and one of the monsters is equipped with "Megamorph", after the switch, you change the ATK of the monster that is equipped with "Megamorph" using the effect of "Megamorph".


 * [Re: Arsenal Bug] If you equip "Megamorph" to "Arsenal Bug" then its ATK will be 4000 or 1000, depending on "Megamorph"'s effect.


 * [Re: Behemoth the King of All Animals] If you have "Behemoth the King of All Animals" with an original ATK of 2000 because you Summoned or Set him with 1 Tribute, and you equip it with "Megamorph", its original ATK will be 4000 when your Life Points are lower, and 1000 when your Life Points are higher.


 * [Re: Chaos Necromancer] If "Chaos Necromancer" is equipped with "Megamorph", its ATK is zero, but if "Megamorph" leaves play, recalculate the ATK of "Chaos Necromancer" using his effect.


 * [Re: Elemental Hero Thunder Giant] If a monster is equipped with "Megamorph" and its ATK is lower than that of "Elemental Hero Thunder Giant", and the effect is activated to destroy the equipped monster, but "Mystical Space Typhoon" is chained to destroy "Megamorph", so that the monster's original ATK is now higher than the ATK of "Elemental Hero Thunder Giant", the effect of "Elemental Hero Thunder Giant" disappears and the monster is not destroyed.


 * [Re: Embodiment of Apophis] "Embodiment of Apophis", while a monster, has original ATK 1600 and original DEF 1800 (for purposes of "Megamorph", etc.).


 * [Re: Fusilier Dragon, the Dual-Mode Beast] If you have "Fusilier Dragon, the Dual-Mode Beast" with original ATK of 1400 because you Summoned or Set it without Tribute, and you equip it with "Megamorph", its original ATK will be 2800 when your Life Points are lower, and 700 when your Life Points are higher.


 * [Re: Goblin King] If you equip "Megamorph" to "Goblin King", "Goblin King"'s ATK is 0.


 * [Re: Gren Maju Da Eiza] If "Gren Maju Da Eiza" is equipped with "Megamorph", its ATK is zero, but if "Megamorph" leaves play, recalculate its ATK using its effect.


 * [Re: Inferno Fire Blast] If "Red-Eyes B. Dragon" equipped with "Megamorph" is selected for "Inferno Fire Blast", you inflict 2400 damage to the opponent.


 * [Re: Karate Man] If "Karate Man" is equipped with "Megamorph" and its ATK is being halved, if you then activate its effect, its ATK is 2000. If you activate its effect and then equip it with "Megamorph" while your Life Points are greater than your opponent's, its ATK is 500. If "Karate Man" is equipped with "Megamorph" and you activate its effect, or if you activate its effect and then equip it with "Megamorph" while your Life Points are less than your opponent's, its ATK is 2000.


 * [Re: King of the Skull Servants] If you have 2 "Skull Servant" cards in your Graveyard (original ATK 2000), and you equip this card with "Megamorph", its current ATK will become either 4000 or 1000, depending on your Life Points.


 * [Re: Maju Garzett] "Maju Garzett"'s ATK will be 0 if you Special Summon it, or Tribute Summon it with a monster with "?" ATK (such as "Gradius' Option" or another "Maju Garzett"), or Tribute Summon it with only 1 Tribute using "Cost Down", or equip it with "Megamorph", or if it's flipped face-down and then face-up again, or if you Tribute Summon it with Mirage Tokens, or if you remove it from play with "Dimensionhole" and it returns to the field.


 * [Re: Megarock Dragon] The original ATK of "Megarock Dragon" is determined by its effect. This is further doubled/halved by "Megamorph" and other effects that are based off of original ATK. So if you Special Summon "Megarock Dragon" with an original ATK of 2100 points, then equip it with "Megamorph", its ATK will be 4200 or 1050 depending on your Life Points.


 * [Re: Obnoxious Celtic Guard] "Obnoxious Celtic Guard"'s effect looks at current ATK, not original ATK. So a monster with 1000 original ATK equipped with "Megamorph" to make it 2000 ATK will not destroy "Obnoxious Celtic Guard" as a result of battle.


 * [Re: Power Bond] The ATK bonus for "Power Bond" is not a fixed number. It is a bonus equal to the original ATK. So if the original ATK changes, so does the bonus from "Power Bond". For example, if you equip the Fusion Monster with "Megamorph" to change the original ATK, the bonus ATK for "Power Bond" adjusts so that the bonus is equal to the new original ATK. For example, if you Summon "Cyber End Dragon" and then equip it with "Megamorph" while your Life Points are lower, its original ATK will become 8000, so it gains an additional 8000 ATK from "Power Bond" for 16000 ATK total.


 * [Re: Sand Moth] After "Sand Moth" is Special Summoned by its own effect, if you equip it with "Megamorph" you will either halve or double its new (2000) original ATK.


 * Shrink: The effect of "Shrink" works like "Megamorph", setting a new current ATK based on original ATK. If the same monster is targeted by both "Shrink" and "Megamorph", only the effect of the card that resolved last will be applied.


 * [Re: Twin-Headed Behemoth] When "Twin-Headed Behemoth" is Special Summoned by its own effect and is equipped with "Megamorph" it is the original ATK/DEF that is doubled or halved. (ATK 3000 / DEF 2400 if doubled, ATK 750 / DEF 600 if halved)


 * [Re: Tyranno Infinity] If "Tyranno Infinity" is equipped with "Megamorph" and the number of removed from play Dinosaurs changes, first change the original ATK of "Tyranno Infinity", and then double or halve for "Megamorph".