Sliver Gravemother + Intruder Alarm + Firewake Sliver + Gemhide Sliver

Exhibition

Decks

How it works

You have at least three opponents.
At most plus three mana of any three 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 paying and sacrificing it.
Choose not to return Sliver Gravemother to the command zone from your graveyard.
Resolve the Sliver Gravemother ability, giving target Sliver +2/+2 until end of turn.
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.

In which brackets is this combo allowed, per Spellbook's Exhibition tier?

1–2 · Exhibition & Core

Allowed in this bracket.

3 · Upgraded

Allowed in this bracket.

4–5 · Optimized & cEDH

All combos are allowed.