Purphoros, God of the Forge, Tainted Strike, and Elemental Mastery

Prerequisites

• Purphoros, God of the Forge on the battlefield
• Tainted Strike in hand
• Elemental Mastery on the battlefield
• Elemental Mastery attached to Purphoros
• Purphoros is untapped and does not have summoning sickness
• You have at least five devotion to red
• available

Steps

1. Cast Tainted Strike, giving Purphoros +1/+0 and infect until end of turn
2. Activate Purphoros by tapping it, creating a number of Elemental tokens with haste equal to Purphoros's power
3. The tokens enter, triggering Purphoros seven times
4. Resolve each trigger giving each opponent fourteen poison counters

Results

• Each opponent loses the game