Deal combat damage using Sage of Hours.
Quilled Greatwurm triggers, putting that many +1/+1 counters on 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.
Repeat each turn.

Infinite turns

Lock

Quilled Greatwurm

Sage of Hours

Deal combat damage using Crystalline Crawler.
Quilled Greatwurm triggers, putting that many +1/+1 counters on Crystalline Crawler.
Move to your postcombat main phase.
Activate Crystalline Crawler's first ability five times by removing five +1/+1 counters from it, adding {3}{R}{R}.
Activate Aggravated Assault by paying {3}{R}{R}, untapping all creatures you control and causing you to get an additional combat and main phase after this one.
Repeat.

Infinite colored mana

Infinite combat phases

Infinite untap of creatures you control

Infinite mana creatures you control can produce

Infinite combat damage

Infinite +1/+1 counters on a creature

Crystalline Crawler

Aggravated Assault

Declare Crystalline Crawler and Hellkite Charger as attackers.
Hellkite Charger triggers, causing you to pay {5}{R}{R} to untap all attacking creatures and to get an additional combat phase after this one.
Deal combat damage using Crystalline Crawler.
Quilled Greatwurm triggers, putting that many +1/+1 counters on Crystalline Crawler.
Move to your next combat phase, and declare Crystalline Crawler and Hellkite Charger as attackers.
Hellkite Charger triggers, holding priority, activate Crystalline Crawler's first ability seven times by removing five +1/+1 counters from it, adding {5}{R}{R}.
Resolve the Hellkite Charger trigger, causing you to pay {5}{R}{R} to untap all attacking creatures and to get an additional combat phase after this one.
Repeat from step 3.

Infinite ETB

Infinite creature tokens with haste

Hellkite Charger

Declare Crystalline Crawler as an attacker, along with any number of Warrior(s) if desired.
If you declared one or more Warrior(s) as attackers, Najeela triggers, creating that many 1/1 Warrior creature tokens that are tapped and attacking.
Deal combat damage using Crystalline Crawler.
Quilled Greatwurm triggers, putting that many +1/+1 counters on Crystalline Crawler.
Activate Crystalline Crawler's first ability five times by removing five +1/+1 counters from it, adding {W}{U}{B}{R}{G}.
Activate Najeela by paying {W}{U}{B}{R}{G}, untapping all attacking creatures, giving them trample, lifelink and haste, and gaining an additional combat phase after this one.
Repeat each combat phase.

Najeela, the Blade-Blossom

Combos with "Quilled Greatwurm"