If they lose this
If LEV win any series (doesn't have to be the KRU one, can be the loser of G2/100T), SEN is in.
100T losing to G2 isn't enough, they'd have to lose the match after that too.
if 100T lose BOTH series, SEN is in.
If LEV lose BOTH series, SEN is out.
SEN has the tiebreaker on 100T because they have series head to head. They won in Kickoff and Stage 1, while 100T only won this last series, meaning SEN has 2-1 h2h on series.
LEV has the tiebreaker on all other teams for h2h, and therefore will win any tiebreaker, which is why they are already qualified for Champs.