They were so popular in 00s playgrounds that they were often banned from schools a phenomenon thats repeating itself now, after the cards enjoyed a pandemic boost courtesy of bored kids and nostalgic millennials
We still have new ways to approach this concept, such as Card not found, but some of the classics, such as Bob and Card not found, came back in new versions
But if you really want to think big damage, look no further than Necropotence or its cousin Necrodominance
If you have cards that are targets of this effect, you must add as many cards to your hand as possible.
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A Ritual summon is usually done by using the specific Ritual Spell card, tributing a number of monsters whose levels equal the Ritual monsters level, and special summoning the Ritual monster from your hand