Cast Wick either from your hand or from the command zone by paying 3 plus commander tax, if applicable.
When Wick enters the battlefield, it triggers.
Holding priority, if you control a Snail, activate Shilgengar by sacrificing the Snail, creating a Blood token.
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 Arcane Adaptation, Wick triggers.
Repeat from step 3.
Arcane Adaptation is the clever linchpin of this entire operation, as choosing "Rat" makes every creature you control count as both a Rat and a Snail simultaneously. This means every time Wick, the Whorled Mind enters the battlefield or triggers, it cleverly plays double duty with its Snail-making and Rat-spawning clauses. Meanwhile, Shilgengar, Sire of Famine stands ready to effortlessly sacrifice those newly minted creatures to churn out an endless sea of Blood tokens. By looping these triggers, you generate infinite sacrifices and artifacts to feed your engine, setting you up for a devastating win.