There are three removable counters on creatures you control if
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Colonel Autumn is in your graveyard.
Mana Needed
({1} magic symbol) ({W} magic symbol) ({B} magic symbol) if
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Colonel Autumn is in your hand, or ({3} magic symbol) if its in your graveyard available.
Steps
Cast
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Colonel Autumn by paying ({1} magic symbol) ({W} magic symbol) ({B} magic symbol) if its in your hand. Otherwise, activate
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Tayam by paying ({3} magic symbol) and removing three counters from creatures you control, causing you to mill three cards and return
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Colonel Autumn from your graveyard to the battlefield with a vigilance counter on it.
When
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Colonel Autumn enters the battlefield, it triggers, exploiting itself and triggering its ability, putting a +1/+1 counter on each creature you control.
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Basking Broodscale triggers, creating a 0/1 Eldrazi Spawn creature token that enters with a vigilance counter on it.
Activate
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Cryptic Trilobite by removing a +1/+1 counter from it, adding ({C} magic symbol) ({C} magic symbol) that can only be spent to activate abilities.
Activate the Eldrazi Spawn by sacrificing it, adding ({C} magic symbol) .
Repeat.
Notes
If you do not control any other creatures, you may instead activate
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Tayam before sacrificing the Eldrazi Spawn, thus using the Eldrazi Spawn's vigilance counter as the third counter for activation. Doing this will add ({1} magic symbol) to the mana needed for the combo.
Results
Infinite LTB.
Infinite ETB.
Infinite sacrifice triggers.
Infinite death triggers.
Infinite self-mill.
Infinite +1/+1 counters on all creatures you control except