Pay {1}{B}{G} to have Polukranos fight Crystalline Crawler.
Vigor prevents the damage, putting a +1/+1 counter on Polukranos and four +1/+1 counters on Crystalline Crawler.
Remove three +1/+1 counters from Crystalline Crawler to add {1}{B}{G}.
Repeat.

Infinite colored mana

Infinitely large creatures

Polukranos, Unchained

Vigor

Crystalline Crawler

Kill Polukranos, triggering Mimic Vat's imprint ability and The Ozolith's first ability.
Resolve the Mimic Vat trigger, exiling Polukranos.
Resolve the The Ozolith trigger, putting six +1/+1 counters on it.
Activate Mimic Vat by paying {3} and tapping it, creating a token copy of Polukranos with haste that enters with six +1/+1 counters on it.
At the beginning of combat on your turn, The Ozolith's second ability triggers, putting all counters on The Ozolith onto Sage of Hours.
Activate Sage of Hours by removing all +1/+1 counters from it, causing you to take at least one extra turn after this one.
At the beginning of your end step, Mimic Vat triggers, exiling the Polukranos token.
The Polukranos token leaves the battlefield, triggering The Ozolith, putting six +1/+1 counters on The Ozolith.
Repeat from step 4 each turn.

Infinite turns

Lock

Sage of Hours

The Ozolith

Mimic Vat

Cast Polukranos Unchained from your graveyard for its escape cost by paying {4}{B}{G} and exiling six other cards from your graveyard, causing it to enter the battlefield with twelve +1/+1 counters on it.
Activate Altar of Dementia by sacrificing Polukranos Unchained.
When Polukranos Unchained dies, The Ozolith's first ability triggers, putting twelve +1/+1 counters on it.
Resolve the Altar of Dementia ability, causing you to mill cards equal to Polukranos Unchained's power.
At the beginning of your combat phase, The Ozolith's second ability triggers, moving the +1/+1 counters from it onto Sage of Hours.
Activate Sage of Hours by removing all +1/+1 counters from it, causing you to take at least two extra turns after this one.
Repeat during your second extra turn.

Combos with "Polukranos, Unchained"