Tazri, Stalwart Survivor, and Puresight Merrow

Prerequisites

• Tazri, Stalwart Survivor on the battlefield
• Puresight Merrow on the battlefield
• Puresight Merrow does not have summoning sickness

Steps

1. Activate Puresight Merrow by tapping it, adding that can only be spent to activate abilities
2. Activate Puresight Merrow by paying and untapping it, exiling the top card of your library
3. Repeat

Results

• Exile your library