Isochron Scepter + Second Chance + Reap

Isochron Scepter

Second Chance

Reap

How it works

1. At the beginning of your upkeep, Second Chance triggers, causing you to sacrifice it and take an extra turn after this one.
2. Activate Isochron Scepter by paying 2 and tapping it, casting a copy of Reap without paying its mana cost.
3. Resolve Reap, returning Second Chance from your graveyard to your hand.
4. Cast Second Chance by paying 2.
5. Repeat each turn.