The Time Law is misleading as written. Apparently this is a known issue, but it had never mattered for me before so I didn't realize it until now. The real law is: if you are on Forest, Mountain, or City Wall, then -30% ATK/DEF. So you should NOT attack from those tiles (even though for the first two kills, Omega punched through anyway).
Currently, Arth has 1,605 views for Langrisser (Warsong) across 15 videos. Langrisser (Warsong) has approximately 3 hours of watchable video on his channel, roughly 10.37% of the content that Arth has uploaded to YouTube.