Krark, the Thumbless, Honor-Worn Shaku, and Mirror Gallery

Prerequisites

• Krark, the Thumbless on the battlefield
• Honor-Worn Shaku on the battlefield
• Mirror Gallery on the battlefield
• plus a variable additional amount available

Steps

1. Activate Honor-Worn Shaku's second ability by tapping an untapped legendary permanent you control, untapping it
2. Activate Honor-Worn Shaku's first ability by tapping it, adding
3. Repeat until there are no more available creatures to tap
4. Cast the first creature-copying spell, targeting Krark
5. When you cast it, Krark and any additional copies of Krark trigger
6. Resolve all Krark triggers, copying that spell for each flip you won, and returning that spell to your hand as long as you lost at least one flip
7. Resolve each copy of that spell, creating a token copy of Krark each time
8. If that spell is back in your hand, repeat from step 1
9. If you won every flip, instead resolve the spell itself, creating one more Krark token and putting the spell into your graveyard
10. Repeat steps 1 through 9 with the second creature-copying spell
11. If you manage to pass a critical threshold of Krark copies before both spells end up in your graveyard, this combo is overwhelmingly likely to be an infinite loop from that point on
12. See the widget below for failure chances
13. Once you have infinite mana and infinite copies of Krark, you can repeat this loop with any instant or sorcery you can cast

Results

• Infinite colorless mana
• Infinite copies of creatures you control
• Infinite copies of instant or sorcery spells you cast
• Infinite magecraft triggers
• Infinite storm count