Homunculus the Alchemic Being

Edison Card Text
Once per turn, you can change the Attribute of this monster.
Dark Revelation Volume 3 • 2006-11-25
No targeting
No Damage Step effect
Banlist • Unlimited
Interactions
Does Caius burn for 1000 if the banished monster was DARK only while on the field (e.g., Homunculus or LaDD)?!
Caius banishes a monster whose Attribute changes on the field.
No. Caius checks after the card is banished; if it is not DARK at that point, no burn is inflicted.
Rulings
edisonformat.net
●This monster’s effect is a Ignition Effect.
●If you use this monster’s effect to change its Attribute, it remains changed as long as it remains face-up on the field, or until it is changed again.
edisonformat.com
This monster’s effect is a Ignition Effect.
If you use this monster’s effect to change its Attribute, it remains changed as long as it remains face-up on the field, or until it is changed again. [HONEST](1) During your Main Phase, you can return this card from the field to its owner’s hand. (2) During either player’s Damage Step, when a face-up LIGHT monster you control battles, you can send this card from your hand to the Graveyard to have that monster gain ATK equal to the ATK of the opponent’s monster it is battling, until the End Phase.
The (1) Ignition Effect can be activated during your Main Phase 1 or 2.
Returning this card to the hand is not a cost.
If "Honest" is flipped face-down, it is not returned to the hand.
The (2) Quick Effect does not target your LIGHT monster.
Sending "Honest" to the Graveyard is a cost.
The ATK gain occurs once, even if that monster (ex: "Asura Priest") battles other monsters after.
This effect can activate in Substep 1 - Start of the Damage Step, Substep 3 - Before Damage Calculation, or Substep 4 - Damage Calculation.
This effect activates & resolves in the hand. It cannot be negated by "Light-Imprisoning Mirror".
This effect cannot be activated while "Dimensional Fissure" is active.
VS. "Shrink: If a monster whose ATK has been modified by "Honest" becomes targeted by "Shrink", the monster’s ATK becomes half its original ATK, and then the ATK increase from "Honest" is re-applied.