When Soul Collector enters the battlefield, Warstorm Surge triggers, causing Soul Collector to deal damage to itself equal to its power.
If an ability from Altar of Dementia is waiting to resolve, let it resolve.
Activate Altar of Dementia by sacrificing Soul Collector.
When Soul Collector dies, it triggers, returning itself from your graveyard to the battlefield.
Repeat from step 2.
This delightfully macabre loop turns Soul Collector's own trigger against itself, leveraging Warstorm Surge to perpetually ping the vampire for lethal damage the moment it hits the battlefield. Because Soul Collector dealt damage to itself this turn, its replacement-style trigger immediately plucks it back from the graveyard whenever it perishes, seamlessly bridging the gap between its demise and its triumphant return. To fuel this endless cycle, Altar of Dementia happily accepts Soul Collector as a sacrifice each iteration, turning the recurring creature into an infinite mill engine that strips away your opponents' libraries card by card.