Tree of Perdition, Star of Extinction, and Boros Reckoner

Prerequisites

• Tree of Perdition on the battlefield
• Star of Extinction in hand
• Boros Reckoner on the battlefield
• Tree of Perdition does not have summoning sickness
• available

Steps

1. Activate Tree of Perdition, exchanging target opponent's life total with Tree of Perdition's toughness
2. Cast Star of Extinction for , destroying target land and dealing 20 damage to all creatures and planeswalkers
3. Boros Reckoner triggers, dealing 20 damage to target opponent

Results

• Target player takes a lethal amount of damage