Trap Monster - Yugipedia - Yu-Gi-Oh! wiki

Trap Monsters is a semi-official term used to describe Trap Cards with effects that Special Summon themselves as a Monster Card. In some cases, once the monster has been Summoned, it is both a monster and a Trap Card simultaneously, and in other cases, the Trap Card will simply Special Summon itself as a Monster Card solely. The card's text will specifically state which is the case.

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