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.

Near-infinite mill

The Mindskinner

Syr Konrad, the Grim

Declare Serra Avatar as an attacker.
When Serra Avatar would deal combat damage to the opponent, The Mindskinner prevents that damage, and causes each opponent to mill that many cards.

Serra Avatar

Cast Body of Research by paying {G}{G}{G}{U}{U}{U}, creating a 0/0 Fractal creature token, then putting a number of +1/+1 counters on it equal to your deck size.
Optionally, give the Fractal token haste, or proceed to your next turn.
Declare the Fractal and The Mindskinner, if desired/able, as attackers.
When the Fractal, and The Mindskinner if it attacked, would deal combat damage to the opponent, The Mindskinner prevents that damage, and causes each opponent to mill that many cards.

Body of Research

Declare Soul of Eternity as an attacker.
When Soul of Eternity would deal combat damage to the opponent, The Mindskinner prevents that damage, and causes each opponent to mill that many cards.

Soul of Eternity

Declare Angelic Enforcer as an attacker.
Angelic Enforcer triggers, doubling your life total.
When Angelic Enforcer would deal combat damage to the opponent, The Mindskinner prevents that damage, and causes each opponent to mill that many cards.

Combos with "The Mindskinner"