Rowan, Scion of War, Exsanguinate, and Wall of Blood

Prerequisites

• Rowan, Scion of War on the battlefield
• Exsanguinate in hand
• Wall of Blood on the battlefield
• Rowan does not have summoning sickness
• You have the highest life total
• available

Steps

1. Activate Wall of Blood by paying 1 life, giving it +1/+1 until end of turn
2. Repeat step 1 until you have paid an amount of life equal to the highest life total among your opponents
3. Activate Rowan by tapping it, reducing the cost of all black and/or red spells you cast this turn
4. Cast Exsanguinate, choosing for X to equal the amount of life you've lost this turn, but paying a total of due to Rowan's ability
5. Resolve Exsanguinate, causing each opponent to lose X life, and you to gain life equal to the life lost this way
6. Each opponent loses the game due to having 0 or less life

Results

• Each opponent loses the game
• Near-infinite lifegain
• Near-infinite lifeloss