You can only use either the (1)st or (2)nd effect of this card’s name once per turn.
(1) Declare 1 Monster Card’s name; neither player can Special Summon monsters with that original name for the rest of this turn, except from the GY.
(2) You can banish this card from your GY and declare 1 Monster Card’s name; neither player can activate the effects of monsters on the field with that original name for the rest of this turn.