Volrath, the Shapestealer | Knacksaw Clique

Cards

All permanents on the battlefield (
Volrath and
Faeburrow Elder without summoning sickness).

Activate
Volrath by paying ({1} magic symbol) , causing it to become a copy of
Faeburrow Elder.
Activate
Volrath by tapping it, adding at least ({G} magic symbol) ({W} magic symbol) ({U} magic symbol) ({B} magic symbol) .
Activate
Volrath by paying ({1} magic symbol) , causing it to become a copy of
Knacksaw Clique.
Activate
Volrath by paying ({1} magic symbol) ({U} magic symbol) and untapping it, exiling the top card of an opponent's library with the ability to play it until end of turn.
Repeat.

If you control a red permanent, this combo will net infinite white, black, red and green mana.

Exile each opponent's library with the ability to play the exiled cards until end of turn.
Infinite red mana.
Infinite green mana.
Infinite black mana.
Infinite white mana.

This combo has been estimated to be Exhibition (Bracket 1+).