Mazirek, Kraul Death Priest + Evolution Witness + Urza's Bauble

Mazirek, Kraul Death Priest

Evolution Witness

Urza's Bauble

How it works

1. Cast Urza's Bauble by paying 0.
2. Activate Urza's Bauble by tapping and sacrificing it.
3. Mazirek triggers, putting a +1/+1 counter on Evolution Witness.
4. Evolution Witness triggers, returning Urza's Bauble from your graveyard to your hand.
5. Resolve the Urza's Bauble ability.
6. Repeat.

This clever loop is powered by the free-to-cast artifact Urza's Bauble, which you can sacrifice repeatedly for zero mana to kickstart the engine. Each time you crack it, Mazirek, Kraul Death Priest spots the permanent sacrifice and places a +1/+1 counter on Evolution Witness. That influx of counters triggers Evolution Witness's ability, allowing you to pluck Urza's Bauble right back out of your graveyard and back to your hand so the whole process can begin anew.