Bound Monsters (Japanese: バウンドモンスター Baundomonsutā, abbreviated
How to Bound Summon a Monster
To Bound Summon a Bound Monster, a specific monster is required, in a manner similar to how Synchro Monsters need a Tuner monster for their Summon; an Element monster. To Summon a Bound Monster, you need an Element monster that meets the requirements of the Bound Monster, whose ATK is between some given values; send it to the Graveyard, then, Bound Summon that Bound Monster from the Extra Deck. You can only Bound Summon 1 Bound Monster each turn. This is depicted as the Element turning into a vector and intersecting a line that has the lower value as the starting point and upper value as the ending point.