Champion of the Weird + Dross Harvester + Nardole, Resourceful Cyborg

Champion of the Weird

Dross Harvester

Nardole, Resourceful Cyborg

How it works

1. Activate Champion of the Weird by paying 1 life and putting two -1/-1 counters on Nardole.
2. Nardole dies due to having 0 toughness, triggering its undying ability and Dross Harvester
3. Resolve the Dross Harvester trigger, causing you to gain 2 life.
4. Resolve the Nardole trigger, returning it from your graveyard to the battlefield with a +1/+1 counter on it.
5. Resolve the Champion of the Weird ability from step 1, causing an opponent to blight 2.
6. Activate Champion of the Weird by paying 1 life and putting two -1/-1 counters on Nardole, causing an opponent to blight 2.
7. Repeat.