Activate Isochron Scepter by paying {2} and tapping it, casting a copy of Cabal Ritual without paying its mana cost.
Resolve Cabal Ritual, adding {B}{B}{B}{B}{B}.
Activate Onyx Talisman by paying {3}, untapping Isochron Scepter.
Repeat.

Infinite storm count

Infinite magecraft triggers

Isochron Scepter

Onyx Talisman

Cabal Ritual

Activate Cabal Coffers by paying {2} and tapping it, adding {B} for each Swamp you control.
Cast Lab Rats with buyback by paying {4}{B}.
Onyx Talisman triggers, causing you to pay {3} to untap Cabal Coffers.
Resolve Lab Rats, creating a 1/1 Rat creature token and returning Lab Rats to your hand.
Repeat.

Infinite ETB

Infinite creature tokens

Infinite mana permanents you control can produce

Cabal Coffers

Lab Rats

Spend {2} and tap to activate Isochron Scepter, casting Songs of the Damned and triggering Onyx Talisman.
Pay {3} for the Onyx Talisman trigger, untapping Isochron Scepter.
Allow Songs of the Damned to resolve, adding at least 6 {B}.
Repeat for infinite {B}.

Infinite black mana

Songs of the Damned

Activate Ashnod's Altar by sacrificing Endless Cockroaches, adding {C}{C}.
Endless Cockroaches dies, returning itself from your graveyard to your hand.
Activate Cabal Coffers by paying {2} and tapping it, adding at least seven {B}.
Cast Endless Cockroaches by paying {1}{B}{B}.
Onyx Talisman triggers, causing you to pay {3} to untap Cabal Coffers.
Repeat.

Infinite death triggers

Infinite LTB

Infinite sacrifice triggers

Endless Cockroaches

Phyrexian Altar

Activate Cabal Coffers by paying {2} and tapping it, adding {B} for each Swamp you control.
Cast Leshrac's Sigil by paying {B}{B}.
Onyx Talisman triggers, causing you to pay {3} to untap Cabal Coffers.
Activate Leshrac's Sigil by paying {B}{B}, returning it from the battlefield to your hand.
Repeat.

Combos with "Onyx Talisman"