Unlimited slivers

[Shivix]

{Sliver Queen} + {Heart Stone} + {Basal Sliver}

[Kiki-Jiki, Mirror Breaker]

+ {soul's attendant}

[Mentonin]

+ {necrotic sliver} and {psionic sliver}. And that haste sliver is optional

[Raven316]

{Sliver Queen} + {Mana echoes} + any sliver = infinite

[BlackJester]

{Sliver Queen} + {Mana echoes} + any sliver = infinite

Been there, done that, loved it!  I miss that combo.  hehehe