Cast Sword of the Meek by paying {2}.
When Sword of the Meek enters, Sokka and Suki's second ability triggers.
Holding priority, activate Arcbound Ravager by sacrificing Sword of the Meek.
Resolve the Sokka and Suki trigger, creating a 1/1 Ally creature token.
When the Ally enters, Sword of the Meek triggers, returning Sword of the Meek from your graveyard to the battlefield attached to the Ally.
Repeat from step 2.

Infinite ETB

Infinite creature tokens

Infinite +1/+1 counters on a creature

Sokka and Suki

Sword of the Meek

Arcbound Ravager

Cast Razor Boomerang by paying {0} due to Sokka, Swordmaster.
When Razor Boomerang enters, Sokka and Suki's second ability triggers, creating a 1/1 Ally creature token.
When the Ally enters, Sokka and Suki's first ability triggers, attaching Razor Boomerang to the Ally token.
Activate the Ally token by tapping it and unattaching Razor Boomerang, dealing 1 damage to any target and returning Razor Boomerang from the battlefield to your hand.
Repeat.

Infinite damage

Infinite storm count

Infinite tapped creature tokens

Sokka, Swordmaster

Razor Boomerang

Smellerbee, Rebel Fighter

Cast Gemcutter Buccaneer by paying {3}{R}. When it enters, Gemcutter Buccaneer triggers, creating a tapped Treasure token that enters as an Equipment.
When the Treasure enters, Sokka and Suki triggers, creating a 1/1 Ally creature token which enters as a Pirate due to Maskwood Nexus.
When the Ally enters, Gemcutter Buccaneer triggers, creating a tapped Treasure token that enters as an Equipment.
Repeat from step 2.

Draw the game

Infinite tapped Treasure tokens

Gemcutter Buccaneer

Maskwood Nexus

Activate Improvised Arsenal by paying {5}, creating a token copy of it.
Sokka and Suki triggers, creating a creature token.
When the creature token enters, Mana Echoes triggers, adding {C} for each creature you control that shares a creature type with the creature token.
Repeat.

Infinite colored mana

Infinite colorless mana

Infinite creature tokens that are infinitely powerful

Infinitely powerful creatures you control

Improvised Arsenal

Mana Echoes

Mycosynth Lattice

Activate Improvised Arsenal by paying {4}{R}, creating a token copy of it.
Sokka and Suki triggers, creating a creature token.
When the creature token enters, Mana Echoes triggers, adding {C} for each creature you control that shares a creature type with the creature token.
If needed, activate Signpost Scarecrow by paying {2}, adding {R}.
Repeat.

Signpost Scarecrow

Combos with "Sokka and Suki"