Helga, Skittish Seer | Mind Over Matter

Cards

Helga does not have summoning sickness and has power 4 or greater.
You control up to seven lands that can tap to produce at least ({2} magic symbol) ({U} magic symbol) ({U} magic symbol) , plus an amount of generic mana equal to ({7} magic symbol) minus
Helga's power.

Activate
Helga by tapping it, adding at least ({U} magic symbol) ({U} magic symbol) ({U} magic symbol) ({U} magic symbol) that can only be spent to cast creature spells with mana value 4 or greater or creature spells with ({X} magic symbol) in their mana cost.
Activate up to seven lands by tapping them, adding at least ({2} magic symbol) ({U} magic symbol) ({U} magic symbol) , plus up to an additional ({3} magic symbol) if needed.
Cast
Palinchron by paying ({5} magic symbol) ({U} magic symbol) ({U} magic symbol) .
Helga triggers, causing you to draw a card, gain 1 life and put a +1/+1 counter on
Helga.
When
Palinchron enters the battlefield, it triggers, untapping up to seven lands.
Activate
Palinchron by paying ({2} magic symbol) ({U} magic symbol) ({U} magic symbol) , returning it from the battlefield to your hand.
Activate
Mind Over Matter by discarding a card, untapping
Helga.
Repeat.

If you have enough leftover mana to cast
Palinchron, you can instead substitute untapping another permanent instead of
Helga.

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 a creature.
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 mana permanents you control can produce.

This combo has been estimated to be Exhibition (Bracket 1+).