Lurking Roper, Sorcerer's Wand, and Batterskull

Prerequisites

• All permanents on the battlefield
• Sorcerer's Wand and Batterskull attached to Lurking Roper
• Lurking Roper does not have summoning sickness

Steps

1. Activate Lurking Roper by tapping it, dealing 1 damage to target player or planeswalker and causing you to gain 1 life
2. Lurking Roper triggers, untapping itself
3. Repeat

Results

• Infinite damage
• Infinite lifegain
• Infinite lifegain triggers