I would like to propose a buff to Neurotoxin's effect on creatures that would prevent Epidemic OTKs while still allowing Rustler to work even when poisoned.
I know serprex has mentioned possibly having Neurotoxin silence creatures after an ability use, which does stop the otk.
I was thinking about creatures that are Neurotoxin'ed will increment poison AND take poison damage for every time a skill is used. It would still allow opponents to use creatures abilities, but create interesting situations if youd want to buff Lava Golems, Forest Spirits, and Steam Machine, or use tanky creatures with strong effects such as Fire Nymph.