Infinite death triggersInfinite creature ETBInfinite lifegainInfinite lifegain triggersInfinite creature LTBInfinite magecraft triggersInfinite creature sacrifice triggersInfinite storm countTarget opponent returns all cards in their graveyard to their hand
How it works
Cast Cloudshift by paying .
Sedgemoor Witch triggers, creating a 1/1 Pest creature token.
Resolve Cloudshift, blinking Skullwinder.
Skullwinder enters the battlefield, returning Cloudshift from your graveyard to your hand and causing target opponent to return a card from their graveyard to their hand.
Activate Phyrexian Altar by sacrificing the Pest, adding .