If this Fusion Summoned card battles an opponent's monster, any battle damage it inflicts to your opponent is doubled
It requires you to mill four cards at the end of your turn, but in Lightsworn decks this is far from a downside
While most people were focused on the Lions Eye Diamonds and Lotus Vales of the world, Flash quietly picked up errata that basically made it so that you couldnt just pick a creature and not pay for it, so that you could do the enters the battlefield trick which was the exact trick the card was originally designed to allow for (albeit, long before they conceived of just how big of design constraints this could put on them in the future if they changed the types of creatures they made)
Having Solve the Equation in the maindeck strengthens these options as well, and being the sole reason I added one Pact of Negation
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