The Mindskinner and Syr Konrad on the battlefield.
You have a way to deal damage to an opponent.
Steps
Attempt to deal damage to an opponent.
The damage is replaced by The Mindskinner, instead causing each opponent to mill that many cards.
Syr Konrad triggers for each creature card put into your graveyard.
Resolve the first trigger, attempting to deal 1 damage to each opponent.
Repeat from step 2.
Notes
This combo ends once all triggers have resolved and opponents have not milled any creature cards. You can then attempt to deal damage again to restart the combo, if needed. Dealing a larger amount of damage, such as having The Mindskinner and other creatures attack, ensures a larger amount of iterations.