[Eldrid]

Ling / hydra doom drop off 3 bases hard counters any sort of stargate play what-so-ever.

Edit: more info...

Im trying ling infestor recently and if p goes 1 or even 2 stagate for harrass I defend my 3base with queens / spores if needed into upgraded lings (+1) into about 10-15 hydra and maximum lings. Comes at around 12-13 min off the top of my head, and if they do have a coll out, it's generally only 1, and generally doesn't have range yet so same range as hydras....

Note that dropping this to their main will be much more effective than trying to bash your head against their naturals defences.

Note above timings based off forge fe...