When this card enters your field ⇒ Draw a card.
When a spell or ability your opponent controls targets a J/resonator you control ⇒ You may banish this card. If you do, cancel that spell or ability.
"Shion, you wait here. Leave the rest to me." - Pricia, Pursuant of Exploding Flame
All of the old addition cards have subtypes.
Old additions have the subtypes "field", "resonator", "ruler", "J-ruler", "J/resonator" or "J/ruler". [...]
An automatic ability triggering and being played to the chase is not considered to be "chasing" to a card, even though the ability still uses the chase.
You choose whether or not to banish this card to cancel the spell or ability when this card's ability resolves.