幻焰之誓

Replace a summoner spell with Empyrean Promise's Vigilance active. Additionally, gain 15% heal and shield power. Active - Vigilance: After a 0.25-second delay, dash to the current location of the target allied champion and gain a 100 – 250 (based on level) (+ 100% AP) (+ 10% bonus health) shield for 3 seconds. Upon arrival, grant the ally the same shield (20 second cooldown; 2000 range).