Nantuko Shrine, Displacer Kitten, Spellbook Seeker // Careful Study, and Phyrexian Altar

Prerequisites

• Nantuko Shrine on the battlefield
• Displacer Kitten on the battlefield
• Spellbook Seeker // Careful Study on the battlefield
• Phyrexian Altar on the battlefield
• available

Steps

1. Cast a copy of Careful Study by paying
2. Nantuko Shrine and Displacer Kitten trigger
3. Resolve the Nantuko Shrine trigger, creating at least one 1/1 Squirrel creature token
4. Resolve the Displacer Kitten, blinking Spellbook Seeker // Careful Study, which enters prepared
5. Activate Phyrexian Altar by sacrificing the Squirrel token, adding one mana
6. Resolve the Careful Study copy, drawing two cards and discarding two cards
7. Repeat

Results

• Infinite ETB
• Infinite LTB
• Infinite death triggers
• Infinite draw triggers
• Infinite magecraft triggers
• Infinite rummaging
• Infinite sacrifice triggers
• Near-infinite self-discard triggers