Infinite artifact ETBInfinite artifact LTBInfinite artifact sacrifice triggersInfinite card draw at the beginning of the next upkeepInfinite draw triggers at the beginning of the next upkeepInfinite +1/+1 counters on a creatureInfinite storm count
How it works
Cast Mishra's Bauble by paying its mana cost.
When Mishra's Bauble enters, Builder's Talent's second ability triggers.
Holding priority, activate Mishra's Bauble by tapping and sacrificing it.
Resolve the Builder's Talent trigger, putting a +1/+1 counter on Evolution Witness.
Evolution Witness triggers, returning Mishra's Bauble from your graveyard to your hand.
Repeat.
This clever loop uses Evolution Witness and Builder's Talent to create a perpetual engine fueled by a tiny artifact. Whenever you cast Mishra's Bauble, Builder's Talent rewards the new noncreature entry by placing a +1/+1 counter onto Evolution Witness. That counter placement triggers Evolution Witness's ability, allowing you to pluck Mishra's Bauble right back out of your graveyard and return it to your hand so you can cast it all over again.