@hmmboi224 there are 2 groups fighting, the Rulers and their "angel" armies and the Monarchs and their "monster" armies. This giant is a Monarch and is asking the MC to release him, in case you forgot from previous chapters MC gained power from the Shadow Monarch.
Is it because their world lacks much progress in science that they needed the pollen stuff explained? I thought it was pretty obvious the second the word "pollen" showed up.
Finally, you have no idea how much I was looking forward to chapters like this after reading the LN and had to imagine what the Shadow Monarch looked like instead if an actual picture.