All rulings 
VS 
King Arthur
6 Excalibur
Invisible Man
2 Impossible to See
King Arthur's Boost vs Impossible to See
officialinteraction authority: archive during 1v1 0
Question
Situation
attacker King Arthur
6
Excalibur
defender Invisible Man
2
Impossible to See
Timing
IMMEDIATELY ›BOOST ›DURING COMBAT ›APPLY DAMAGE ›AFTER COMBAT