Please help identify, could be a Bionicle? (yellow with green mask)
Looks like you have a portion of 8998-1 Toa Mata Nui.

This set is sometimes called &quot;Titan Mata Nui&quot; among fans, to better distinguish this &quot;Titan&quot; set from the regular &quot;Mata Nui&quot; set, which is how the character Toa Mata Nui actually appears in BIONICLE media.
The transparent green piece does not go to it though, and I'm not sure what it is.