Krark, the Thumbless + Sakashima the Impostor Combo

Krark and Sakashima the Impostor on the battlefield (Sakashima the Impostor as a copy of Krark on the battlefield).

Mana Ritual and Instant or Sorcery that Creates One or More Nonlegendary Copies of a Creature You Control in hand.

This combo has a chance of failure based on the amount of starting mana you have and your first few coin flips

It may take significantly more or less mana than the amount shown

See the widget below for calculations.

Cast the instant or sorcery that creates a copy of a creature by paying its mana cost, targeting Sakashima the Impostor.

When you cast that spell, Krark and any additional copies of Krark trigger.

Resolve all Krark triggers, copying that spell for each flip you won, and returning the original to your hand as long as you lost at least one flip.

Resolve each copy of that spell, creating a token copy of Krark each time.

If that spell is back in your hand and you need additional mana, cast the Mana Ritual by paying its costs, then repeat from step 2.

If that spell is back in your hand and you have enough mana, instead repeat from step 1.

If you won every flip, instead resolve the card itself, creating one more Krark token and putting the card into your graveyard.

If you manage to pass a critical threshold of Krark copies before the copying spell ends up in your graveyard, this combo is overwhelmingly likely to be an infinite loop from that point on. See the widget below for failure chances.

Once you have infinite mana and infinite copies of Krark, you can repeat this loop with any instant or sorcery you can cast.

Infinite copies of creatures you control

Infinite copies of instant or sorcery spells you cast

Infinite magecraft triggers

Infinite storm count