Emry, Lurker of the Loch | Genesis Chamber | Phyrexian Altar

(and one other card)

Phyrexian Metamorph is a copy of
Genesis Chamber.
Enough additional mana and/or artifacts on the battlefield to make up for
Emry's command tax (if applicable).

Cast
Emry by paying ({U} magic symbol) plus commander tax (if applicable).
When
Emry enters the battlefield, it triggers itself,
Genesis Chamber, and the copy of
Genesis Chamber.
Resolve both
Genesis Chamber triggers, creating two 1/1 Myr artifact creature tokens.
Resolve
Emry's ability, milling four cards.
Activate
Phyrexian Altar by sacrificing
Emry, adding ({U} magic symbol) .
Send
Emry from the graveyard to the command zone as a state-based action.
Repeat any number of times.
Once you have infinite creature tokens, you may activate
Phyrexian Altar any number of times.