Spelljack, Chandra, Hope's Beacon, and Displacer Kitten

Prerequisites

• Spelljack in hand
• Chandra, Hope's Beacon on the battlefield
• Displacer Kitten on the battlefield
• You have an additional instant or sorcery card in hand
• You have not copied a spell using Chandra this turn
• plus enough mana to cast the additional instant or sorcery card available

Steps

1. Cast any other instant or sorcery card from your hand by paying its mana cost
2. Chandra and Displacer Kitten triggers
3. Resolve the Displacer Kitten trigger, blinking Chandra
4. Resolve the Chandra trigger, creating a copy of the instant or sorcery
5. Holding priority, cast Spelljack by paying , targeting the instant or sorcery cast in step 1
6. Chandra and Displacer Kitten triggers
7. Resolve the Displacer Kitten trigger, blinking Chandra
8. Resolve the Chandra trigger, creating a copy of Spelljack that is targeting the original Spelljack
9. Resolve the copy of Spelljack, countering the original Spelljack and exiling it with the ability to cast it for free from exile
10. Cast Spelljack from exile without paying its mana cost, targeting the instant or sorcery cast in step 1
11. Repeat from step 6

Results

• Infinite magecraft triggers
• Infinite storm count