Faking zealot immortal allin with archon immortal drop
The build start from a normal nexus into core. Single chrono adept into stalker. Robo asap and tc when the immo(chrono) is on the way. 2nd gate around 3:20 and grab 2 gas after making the prism(chrono). Templar archive asap. Take your third after the prism flies out carrying the immo. Warp in 2 HT to morph an archon and try to get some damage.
Here is the idea: open robo and make immortal prism. Expand after 4:30. From Zerg's perspective this looks exactly like an 8 gate zealot immortal allin which hits around 4:40. (Though you are missing 6 gates and the gas in your natural are taken.) To defend this allin Zerg need to stop making drones around 4:00 but this is only an immortal archon drop with a late third. If Zerg counter attacks with roach and lings, immortal archon will hold it with battery and prism support. The build is a weird variant of archon drop: instead of forcing spores with an orcacle before dropping archons you force early drone cut with a fake allin. One archon is replaced by an immortal to make the build smoother, which means you cannot clear ovies very fast but you can kill roaches. Also the drop hits 30 seconds faster.