Ulvenwald Mysteries + Angelic Sleuth + Ashnod's Altar + Good-Fortune Unicorn

Ulvenwald Mysteries
Angelic Sleuth
Ashnod's Altar
Good-Fortune Unicorn

Requires
Ulvenwald Mysteries must be on the battlefield. Angelic Sleuth must be on the battlefield. Ashnod's Altar must be on the battlefield. Good-Fortune Unicorn must be on the battlefield. You control a Clue. Mana needed: 2
Steps
  1. Activate a Clue by paying 2 and sacrificing it.
  2. Ulvenwald Mysteries' second ability triggers, creating a 1/1 Human Soldier creature token.
  3. The Human Soldier enters the battlefield, triggering Good-Fortune Unicorn, putting a +1/+1 counter on the Human Soldier.
  4. Resolve the Clue ability from step 1, causing you to draw a card.
  5. Activate Ashnod's Altar by sacrificing the Human Soldier, adding .
  6. The Human Soldier leaves the battlefield, triggering Angelic Sleuth, creating a Clue token.
  7. Repeat.
Results
Infinite card draw. Infinite draw triggers. Near-infinite death triggers. Near-infinite ETB. Near-infinite LTB. Near-infinite sacrifice triggers.