Select 1 face-up Level 2 or lower Normal Monster on your side of the field to activate this card. Special Summon from your Deck to your side of the field as many cards as possible with the same name as the selected monster.
League of Uniform Nomenclature makes the activation of Delta Attacker much easier by special summoning most of the monsters needed to the field.
Possible OTK combo
Use Three-Star Demotion to lower the level of a level 5 or lower normal monster in your hand. Normal summon the monster and use League of Uniform Nomenclature to special summon 2 more copies of that monster from the deck, then use Delta Attacker so all 3 can attack directly. This combo has the potential to OTK, but is very difficult to pull off.