Necrotic Ooze, Tree of Redemption, Phyrexian Colossus, and Auriok Bladewarden

Prerequisites

• Necrotic Ooze on the battlefield
• Tree of Redemption in the graveyard
• Phyrexian Colossus in the graveyard
• Auriok Bladewarden in the graveyard
• Necrotic Ooze does not have summoning sickness
• Your life total is at least twenty-five

Steps

1. Activate Necrotic Ooze using Auriok Bladewarden's ability by tapping it, giving itself +X/+X until end of turn, where X is Necrotic Ooze's power
2. Activate Necrotic Ooze using Phyrexian Colossus' ability by paying eight life, untapping it
3. Repeat two additional times
4. Activate Necrotic Ooze using Tree of Redemption's ability by tapping it, causing you to swap your life total with Necrotic Ooze's toughness
5. Activate Necrotic Ooze using Phyrexian Colossus' ability by paying eight life, untapping it
6. Activate Necrotic Ooze using Auriok Bladewarden's ability by tapping it, giving itself +X/+X until end of turn, where X is Necrotic Ooze's power
7. Activate Necrotic Ooze using Phyrexian Colossus' ability by paying eight life, untapping it
8. Repeat from step 4

Results

• Infinite lifegain
• Infinite lifegain triggers
• Infinitely large creatures until end of turn