Deal combat damage using Obeka, triggering its ability, causing you to get at least four extra upkeep steps.
At the beginning of your upkeep, Smaug triggers, creating a Treasure token.
Repeat step 2 during each other extra upkeep step, creating at least four additional Treasures.
During your postcombat main phase, activate five Treasures by tapping and sacrificing them, adding {3}{R}{R}.
Activate Aggravated Assault by paying {3}{R}{R}, causing you to untap all creatures you control and get an additional combat and main phase after this one.
Repeat.

Infinite artifact ETB

Infinite artifact LTB

Infinite artifact sacrifice triggers

Infinite artifact tokens

Infinite Treasure tokens

Infinite colored mana

Infinite combat damage

Infinite combat phases

Infinite damage

Infinite mana creatures you control can produce

Infinite untap of creatures you control

Obeka, Splitter of Seconds

Smaug the Magnificent

Aggravated Assault

At the beginning of your upkeep, Smaug triggers, creating a Treasure token.
Deal combat damage using Obeka, triggering its ability, causing you to get at least four extra upkeep steps.
Repeat step 1 during each extra upkeep step, creating at least four additional Treasures.
Activate Time Sieve by tapping it and sacrificing five Treasures, causing you to take an extra turn after this one.
Repeat each turn.

Infinite turns

Lock

Time Sieve

Declare The Incredible Hulk and Smaug the Magnificent as attackers.
Smaug the Magnificent triggers, dealing 1 damage to The Incredible Hulk.
The Incredible Hulk triggers, putting a +1/+1 counter on it, untapping it and giving you an additional combat phase after this one.
Repeat each combat phase.

Infinite +1/+1 counters on a creature

Bruce Banner // The Incredible Hulk

Declare Smaug as an attacker, triggering its ability, dealing at least 5 damage to Raphael.
Raphael triggers, adding at least {R}{R}{R}{R}{R}.
Move to your postcombat main phase.
Activate Aggravated Assault by paying {3}{R}{R}, causing you to untap all creatures you control and get an additional combat and main phase after this one.
Repeat

Infinite red mana

Raphael, Ninja Destroyer

Declare Smaug and Hellkite Charger as attackers, triggering their abilities.
Resolve the Smaug trigger, dealing at least 7 damage to Raphael.
Raphael triggers, adding at least seven {R}.
Resolve the Hellkite Charger trigger, causing you to pay {5}{R}{R} to untap all attacking creatures you control and get an additional combat phase after this one.
Repeat each combat phase.

Hellkite Charger

Combos with "Smaug the Magnificent"