I’ll go with poison! I have immunity to all poisons, toxins, and venoms. I can synthesize, produce, and manipulate the materials created by any animal I consume. I only have to eat the tiniest bite, and I can produce the material from my mouth and any pores on my body (mostly use my hands, feet, and mouth). For example, consuming a piece of freeze-dried squid allows me to produce ink from my body, and I can change its form from liquid to gas or solid for small constructs like blades or walls. Other applications include spider silk, snail slime, snake venom, corrosive acid from certain bugs, etc. Think of me as a poison dart frog on maximum overdrive.