- You cannot activate both effects of this card during the same turn. You can either add 1 "Elegant Egotist" to your hand or add 3 "Harpie" cards with different names to your hand.
- The effect that is activated during the End Phase can also add "Harpies' Hunting Ground" to your hand.
- If "Mystical Space Typhoon" is activated in a Chain to the activation of "Hysteric Sign", "Elegant Egotist" cannot be added to the hand. Also, in that case, even if "Hysteric Sign" was sent from the field to the Graveyard, since 1 of the effects of "Hysteric Sign" was already activated, the effect that adds 3 "Harpie" cards with different names from the Deck to your hand cannot be activated.