Resonance Summon

A Resonance Summon (レゾナンス召喚, Rezonansu Shoukan) is the method of ing a Resonance Monster. To Summon a Resonance Monster, you must have an appropriate Wave monster on your field and the correct monster(s) located on your field, in your hand, Graveyard, or Banished Zone (depending on the monster being summoned). Using the Level of the Wave monster on the field as a starting point, the Levels of the monsters being used must count upward/downward in a sequence required by the Resonance Monster being summoned. In card text, this is referenced as a "Count-Up X" or a "Count-Down X", with "X" being the number of cards included in the sequence.

Example
A Resonance Monster's Summon text would go as follows:

"1 Level 1 Wave monster -> Count-Up 3"

With this, in order to Summon this monster, a player would have to have a Level 1 Wave monster on their field and 3 monsters, each being a different Level counting upward after 1 (in this instance, a Level 2, 3, and 4 monster), on their field, in their hand, Graveyard, or Banished Zone. The Wave monster along with the 3 other monsters are then taken from wherever they originally were and then placed underneath the Resonance Monster, like, an the monster is summoned to the field.