The main two were Cero Lanza and Cero Esfera.
For those curious, the way we canonized much of our abilities was essentially , kido was very effective at stopping arrancar powers. Hence, it made sense to deduce that there would be similarities between the ways shinigami and arrancar used and manifested reiatsu.
We created Cero Lanza, which was a highly condensed shot of cero energy , like a laser bolt, capable of blasting through objects, rather than detonating on impact.
Cero Esfera was a last ditch effort. The wielder released all their remaining reiatsu, drew it back into themsleves, then detonated it, causing an immense explosion to radiate outwards in every direction from them. It's super destructive but leaves the user completely empty on Reishi reserves
Then you also had the standard Cero and Grab Rey Cero ofcourse.
I remember taking out 2 captains at once with Cero Esfera. That was pretty boss.