If 'At the end of the turn during which fusion took place...', or similar requirements are listed in your Digimon's fusion requirements, they will still apply even if you had made this card directly appear from your hand through the use of Option cards
Has the ruling changed
Plastic card sleeves are low-cost, lightweight, and easy to carry, making them one of the most common types of card sleeves today
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I dont think it necessarily falls behind the others too much
For the time being, I can put out the Genocide King of Chess Archfiend in the easiest way to use it from my hand, Combined with devil tuners such as Resonator, it's not weak that you can aim for 3-6 synchros such as Hert Twin Cop, which is said to be strong if you get it right