Thrumming Stone, Memory Lapse, Chandra, Hope's Beacon, and Displacer Kitten

Prerequisites

• Thrumming Stone on the battlefield
• Memory Lapse in hand
• Chandra, Hope's Beacon on the battlefield
• Displacer Kitten on the battlefield
• available

Steps

1. Cast any other spell, or wait for an opponent to cast one
2. If you cast the spell, Displacer Kitten triggers, blinking Chandra
3. Cast Memory Lapse by paying , targeting that spell
4. Chandra, Displacer Kitten and Thrumming Stone trigger
5. Resolve the Chandra trigger, creating a copy of Memory Lapse, targeting the original Memory Lapse
6. Resolve the copy of Memory Lapse, countering the original Memory Lapse and putting it on top of your library
7. Resolve the Displacer Kitten trigger, blinking Chandra
8. Resolve the Thrumming Stone trigger from step 3, revealing the top four cards of your library and casting Memory Lapse without paying its mana cost
9. Repeat from step 4

Results

• Infinite magecraft triggers
• Infinite storm count