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Thus, even if a Numeron Dragon Summoned this way is destroyed, the controller can repeatedly Special Summon it in Defense Position to protect their LP from the opponent's attacks, as long as the opponent doesn't have a monster that can deal piercing battle damage

And then you get different effects depending on what type of monster you banished, with each one helping your strategy in different ways

Since the text also says you cant use any other methods to Summon it, you cant use Monster Reborn, etc

Luckily, most young kids are more interested in collecting and trading the cards than they are playing the actual game