Engraved Rune of Sudden Aggressiveness (JRV-036 N) [Journey to Ravidra]

As this card enters the field, choose a resonator you control to be referenced by the other abilities of this card until end of game. [Rest]:Put a [+100/+100] counter on the chosen resonator, then double the number of [+100/+100] counters on it. The chosen resonator deals damage equal to its ATK to up to one target resonator your opponent controls. [Solo Mode] Whenever another player plays a non-resonator spell >>> If the chosen resonator's ATK is 800 or more, banish this card and cancel that spell.