You control up to seven lands that can tap to produce at least ({1} magic symbol) ({G} magic symbol) .
Helga does not have summoning sickness and has power 7 or greater.
Steps
Activate
Helga by tapping it, adding an amount of ({U} magic symbol) equal to its power that can only be spent to cast creature spells with mana value 4 or greater or with ({X} magic symbol) in their mana cost.
Activate up to seven lands by tapping them, adding at least ({1} magic symbol) ({G} magic symbol) .
Cast
Great Whale by paying its mana cost.
Helga and
Chakram Retriever trigger.
Resolve the
Helga trigger, causing you to draw a card, gain 1 life, and put a +1/+1 counter on
Helga.
Resolve the
Chakram Retriever trigger, untapping
Helga.
Resolve the
Great Whale spell.
When
Great Whale enters the battlefield, it triggers, untapping up to seven lands.
Activate
Temur Sabertooth by paying ({1} magic symbol) ({G} magic symbol) , returning
Great Whale from the battlefield to your hand.
Repeat.
Results
Infinite card draw.
Near-infinite lifegain.
Near-infinite lifegain triggers.
Infinite draw triggers.
Near-infinite mana lands you control can produce.
Near-infinite untap of lands you control.
Near infinite ETB.
Near infinite LTB.
Near infinite storm count.
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.