Elemental Absorber [Continuous Trap Card]
Remove from play 1 Monster Card in your hand. While this card is on the field, your opponent's monsters that have the same Attribute as the monster removed by this effect cannot declare an attack.
Removing from play 1 Monster Card in your hand is not a cost. It is part of the effect of "Elemental Absorber".
You only remove from play 1 Monster Card from your hand and when "Elemental Absorber" resolves. You can't remove additional cards later. You can't remove from play more than 1 card when "Elemental Absorber" resolves
Why? Everything we have learned and worked on, deciphering what is a cost and what isn't does not coincide with this ruling. Its at the beginning of the text. It is in its own sentence. So why is it not a cost?
Does that mean, if my opponent negates the activation of Elemental Absorber, that I do not have to remove 1 monster from my hand?