I can't believe this story is still being written, it's been running longer after I thought it would finish than it was before i thought it would finish.
Is it going to be 600 chapters long?
You literally can't understand the threat or how he completed the impossible mission without reading the WN/LN, what the fuck is the artist even thinking. This is like a fans only webtoon I have no idea how newbies can make sense of any of this.
If the doubled attack can still stack effects, costs no mp, and costs no or minimal animate time, then the only way it would be worthless is if it took up the slot of something better. It goes from OP to gamebreaking at 25% though.