Seems like the David original anime is a power-armor/mecha fantasy series. Doesn't look that good since the armors and big robots are CG, but at least it's something new: https://youtu.be/VHoDvjIMhR8

>>23313774 (OP)
A few of those enemies seem to be biological creatures, at 0:23, 0:32. and 1:20. Maybe it's a mix of human and monster/kaiju foes?

>>23313774 (OP)
kinda reminds me of Back Arrow
looks like they're channeling fight energy into a robot/hero form?

>>23314260
The description on the official website kinda makes these sound like magical or spiritual mechs like those in wataru or rahearth

>>23314523
*Rayearth