Oh they must have gotten rid of it hehe.

Yeah the immortals were extremely OP. When I played with my friend in duos what we would do is immortal spam or one of us makes Hellbats and upgrades them and the other makes healers and upgrades.

You can force some pretty interesting pile ups by creating lots of Phoenix in the early game because they can't atk ground units they just fly right to the enemy's base, causing enemy ranged units to follow it. Then once they start going backwards you can start piling up your own ground units.

Nexus wars was a lot of fun, almost more fun than the actual real game in my opinion.