Altar of Dementia and Xenograft on the battlefield.
Xenograft on the battlefield with "Rat" chosen.
({3} magic symbol) ({B} magic symbol) plus enough mana to pay for commander tax, if applicable available.
Steps
Cast Wick either from your hand or from the command zone by paying ({3} magic symbol) ({B} magic symbol) plus commander tax, if applicable.
When Wick enters the battlefield, it triggers.
Holding priority, if you control a Snail, activate Altar of Dementia by sacrificing the Snail, causing target player to mill cards equal to the Snail's power.
If needed, repeat step 3 until you do not control a Snail.
Resolve the Wick trigger, creating a 1/1 Snail creature token.
When the Snail enters the battlefield as a Rat due to Xenograft, Wick triggers.