Loporrit Scout, Sinking Feeling, Ashnod's Altar, and Elemental Mastery

Prerequisites

• Loporrit Scout on the battlefield
• Sinking Feeling on the battlefield
• Ashnod's Altar on the battlefield
• Elemental Mastery on the battlefield

Steps

1. Activate Loporrit Scout by tapping it, creating a number of 1/1 Elemental creature tokens with haste
2. When the creature token enters the battlefield, Loporrit Scout triggers, giving Loporrit Scout +1/+1 until end of turn
3. Acitvate Loporrit Scout by paying and putting a -1/-1 counter on it, untapping it
4. Activate Ashnod's Altar by sacrificing a creature token, adding
5. Repeat

Results

• Infinite LTB
• Infinite ETB
• Infinite sacrifice triggers
• Infinite death triggers
• Infinite colorless mana
• Infinite creature tokens with haste