Activate Command Beacon's second ability by tapping and sacrificing it.
Titania's second ability triggers, creating a 5/3 Elemental creature token.
Activate Food Chain by exiling Titania, adding six {G} that can only be spent to cast creature spells.
Choose to have Titania put into the command zone from your graveyard.
Resolve the Command Beacon ability from step 1, putting Titania from the command zone into your hand.
Cast Titania by paying {3}{G}{G}.
Titania enters the battlefield, returning Command Beacon from your graveyard to the battlefield.
Repeat.

Infinite colored mana that can only be spent to cast creature spells

Infinite ETB

Infinite landfall triggers

Infinite LTB

Infinite storm count

Titania, Protector of Argoth

Command Beacon

Food Chain

Activate Command Beacon's second ability by tapping and sacrificing it, putting Lord Windgrace into your hand from the command zone.
Activate Archaeological Dig's second ability by tapping and sacrificing it, adding {R}.
Activate Planebound Accomplice by paying {R}, putting Lord Windgrace from your hand onto the battlefield.
Activate Lord Windgrace's second ability by removing three loyalty counters from it, returning Archaeological Dig and Command Beacon from your graveyard to the battlefield.
Activate Heart of Kiran's crew ability twice by removing two loyalty counters from Lord Windgrace, turning it into a creature
Lord Windgrace goes to the graveyard due to having zero loyalty coutners.
Choose to return Lord Windgrace to the command zone from your graveyard.
Repeat.

Combos with "Command Beacon"