Lurking Roper + Elemental Mastery + Soul's Attendant

Lurking Roper
Elemental Mastery
Soul's Attendant

Requires
Lurking Roper must be on the battlefield. Elemental Mastery must be on the battlefield. Soul's Attendant must be 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 Soul's Attendant four times.
  3. Resolve the first Soul's Attendant trigger, causing you to gain one life.
  4. Lurking Roper triggers, untapping itself.
  5. Repeat.
Results
Infinite creature tokens with haste. Infinite ETB. Infinite lifegain. Infinite lifegain triggers.

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Rugged Prairie
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Blossoming Sands
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