Lurking Roper, Elemental Mastery, and Healer of the Pride

Prerequisites

• Lurking Roper on the battlefield
• Elemental Mastery on the battlefield
• Healer of the Pride on the battlefield
• Lurking Roper does not have summoning sickness
• Elemental Mastery attached to Lurking Roper

Steps

1. Activate Lurking Roper by tapping it, creating four 1/1 Elemental creature tokens
2. When the Elementals enter the battlefield, they trigger Healer of the Pride four times
3. Resolve the first Healer of the Pride trigger, causing you to gain two life
4. Lurking Roper triggers, untapping itself
5. Repeat

Results

• Infinite creature tokens with haste
• Infinite ETB
• Infinite lifegain
• Infinite lifegain triggers