Siduri, Assassin of Swift Dance (JRV-066 R) [Journey to Ravidra]

"Mythic" [Quickcast] [Blood Trail] (If J/resonators attacked two times this tum, this card gains [Swiftness] as it enters the field until end of turn, and enters the field with two [+100/+100] counters on it.) You pay W less to play this card for each resonator that has attacked this turn. [Enter] Put two battle counters on a J/ruler you control. [Rest] or R: Remove two battle counters from a J/ruler you control or two [+100/+100] counters from this card: This card deals 700 damage to target attacking or blocking resonator.