Ninjago but it's the Worst Thing Every Villain has done

The Ninjago franchise has a lot of villains. But what are the worst things they've done? Here's a compilation of what I think those are.
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0:00 Samukai
0:25 Lord Garmadon
0:34 Pythor
1:04 Overlord
1:45 Chen
2:11 Morro
2:24 Nadahkan
3:01 Master Yang
3:22 Krux
3:46 Harumi
4:51 Iron Baron
5:17 Omega
5:29 Aspheera
5:57 Vex
6:20 Unagami
6:37 Skull Sorcerer
7:10 Mammatus
7:37 Kalmaar
8:13 Beatrix
8:30 Lord Ras