Helga, Skittish Seer, Mind Over Matter, and Sparkcaster

Prerequisites

• Helga, Skittish Seer on the battlefield
• Mind Over Matter on the battlefield
• Sparkcaster in hand
• Helga does not have summoning sickness and has power 3 or greater
• 
• available

Steps

1. Activate Helga by tapping it, adding at least or that can only be spent to cast creature spells with mana value 4 or greater or creature spells with in their mana cost
2. Cast Sparkcaster by paying
3. Helga triggers, causing you to draw a card, gain 1 life and put a +1/+1 counter on Helga
4. When Sparkcaster enters the battlefield, its first and second ability trigger
5. Resolve the first Sparkcaster trigger, returning itself from the battlefield to your hand
6. Resolve the second Sparkcaster trigger, dealing 1 damage to any target
7. Activate Mind Over Matter by discarding a card, untapping Helga
8. Repeat

Results

• Near-infinite mana permanents you control can produce
• Infinite self-discard triggers
• Near-infinite lifegain
• Near-infinite lifegain triggers
• Near-infinite ETB
• Infinite draw triggers
• Infinite looting
• Near-infinite storm count
• Near-infinite LTB
• Near-infinite untap of permanents you control
• Near-infinite +1/+1 counters on Helga
• Near-infinite colored mana that can only be spent to cast creature spells with mana value 4 or greater or creature spells with X in their mana cost
• Near-infinite damage