Sliver Gravemother, Intruder Alarm, Cloudshredder Sliver, Manaweft Sliver, and Basal Sliver Combo

Prerequisites

Sliver Gravemother in the command zone
Intruder Alarm on the battlefield
Cloudshredder Sliver on the battlefield
Manaweft Sliver on the battlefield
Basal Sliver on the battlefield
You have at least three opponents
At most two mana of any two different colors available, plus enough mana to pay for commander tax, if applicable

Activate all Slivers you control by tapping them, adding one mana of any color for each Sliver tapped this way
Cast Sliver Grandmother from the command zone by paying and commander tax, if applicable
When Sliver Grandmother enters the battlefield, Intruder Alarm triggers
Holding priortiy, activate Sliver Gravemother by tapping it, adding one mana of any color
Resolve the Intruder Alarm trigger, untapping all creatures
Activate all Slivers you control by tapping them, adding one mana of any color for each Sliver tapped this way
Activate Sliver Gravemother by sacrificing it, adding
Choose not to return Sliver Gravemother to the command zone from your graveyard
Activate Sliver Gravemother's encore ability by paying and exiling it
Choose to return Sliver Gravemother to the command zone from exile
Resolve the Sliver Gravemother ability, creating a token copy of it for each opponent you have
When the Sliver Gravemother tokens enter the battlefield, Intruder Alarm triggers that many times
Holding priority, activate the Sliver Gravemother tokens by tapping them, adding at least three mana of any color(s)
Resolve the first Intruder Alarm trigger, untapping all creatures
Activate all Slivers you control by tapping them, adding one mana of any color for each Sliver tapped this way
Repeat from step 15 for each remaining trigger
Repeat from step 1