Detonator is a Sigil that appears in Act II and Act III. When a Card bearing this Sigil dies, all adjacent cards (those to the left, right and front of the card) are dealt 10 damage. This effect doesn't apply for sacrificing a card bearing this Sigil, but destroying it with the hammer does activate the Sigil.
This sigil can be naturally found on the Explode Bot. In Act III, it can be given to a card of the players choice with the Bomb Latch Sigil.
Strategy[]
Playing a card with this Sigil is a big risk, as it has the potential to defeat neighboring friendly cards. However, it does have some effective uses that can make it worth using. A card bearing this Sigil can be hit with the hammer to destroy it instantly, activating its effect and wiping out opposing cards and freeing up space - including those with the Repulsive Sigil. It can also be used against Waterborne cards such as Salmon to defeat them.
When playing against or alongside a card with Detonator, ensure that it is capable of surviving the 10 damage blast; a card with Nano Armor is usually the best option.