When Negate is used against a tool card with multiple targets, it only cancels the effect for one specific target.

Negate can be used both during and outside a player's turn. It can counter any tool card regardless of who played it or who the target is.

A player can use Negate on their own tool cards.

Negate can be used to counter another Negate. A second Negate can counter the first, and a third can counter the second, continuing this chain indefinitely.

To negate a delay tool card, Negate must be used at the time of judgment, not when the delay card is placed.