I forgot to screenshot the moment, so I’ll post the post-battle results.
What happened was that it was when my team aced and destroyed all of the enemy’s turrets. As my team and our aced minions was focusing on the vain crystal, the enemy team just spawned in. They deleted us all, got an ace, and started to erase my team’s minions. However, my team and I put the crystal on such low health that the very last minion was able to destroy the crystal just before he died.
tl;dr, my team won only because of a clutch.