Cast Changeling Titan by paying its mana cost.
When Changeling Titan enters the battlefield, its champion ability and Molten Echoes triggers.
Resolve the Molten Echoes trigger, creating a token copy of Changeling Titan with haste.
When the Changeling Titan token enters the battlefiled, its champion ability triggers, exiling the nontoken Changeling Titan until the token Changeling Titan leaves the battlefield.
Resolve the champion ability from step 2, exiling the token Changeling Titan.
The token Changeling Titan leaves the battlefield, returning the nontoken Changeling Titan from exile to the battlefield.
Repeat from step 2.

Infinite LTB

Infinite ETB

Molten Echoes

Changeling Titan

Cast Deathbellow War Cry by paying {5}{R}{R}{R}, putting Changeling Berserker, Changeling Hero, and Changeling Titan onto the battlefield.
Changeling Hero, Changeling Titan, and Changeling Berserker enters the battlefield triggers.
Resolve Changeling Hero triggers by championing Changeling Titan.
Resolve Changeling Titan triggers, does nothing.
Resolve Changeling Berserker triggers by championing Changeling Hero.
Changeling Titan enters the battlefield triggers.
Resolve Changeling Titan triggers, championing Changeling Berserker.
Changeling Hero enters the battlefield triggers.
Repeat from step 3.

Deathbellow War Cry

Changeling Hero

Changeling Berserker

Cast Changeling Titan by paying {4}{G}.
Changeling Titan enters the battlefield, championing Karmic Guide.
Activate Ashnod's Altar by sacrificing Changeling Titan, adding {C}{C}.
Changeling Titan dies, causing Karmic Guide to return to the battlefield from exile.
Karmic Guide enters the battlefield, returning Changeling Titan from your graveyard to the battlefield.
Repeat from step 2.

Infinite colorless mana

Infinite death triggers

Infinite sacrifice triggers

Karmic Guide

Ashnod's Altar

Cast Changeling Titan by paying {4}{G}.
When Changeling Titan enters the battlefield, its champion ability and Dual Nature's first ability trigger.
Resolve the Dual Nature trigger, creating a token copy of Changeling Titan.
When the Changeling Titan token enters the battlefield, its champion ability triggers, exiling the nontoken Changeling Titan.
Dual Nature's second ability triggers, exiling the Changeling Titan token.
When the Changeling Titan token leaves the battlefield, the nontoken Changeling Titan is returned to the battlefield from exile.
Repeat from step 2.
If you control additional creatures you wish to blink, you may resolve the Changeling Titan trigger in step 2 to exile them, and then proceed with the combo.

Infinite blinking

Dual Nature

Cast Changeling Titan by paying {3}{R}.
When Changeling Titan enters the battlefield, it and Terror of the Peaks trigger.
Resolve the Changeling Titan trigger, exiling Bladewing until Changeling Titan leaves the battlefield.
Resolve the Terror of the Peaks trigger, dealing damage to Changeling Titan equal to Changeling Titan's power.
Changeling Titan dies as a state-based action due to having 0 or less toughness.
When Changeling Titan dies, it triggers, returning Bladewing from exile to the battlefield.
When Bladewing enters the battlefield, it and Terror of the Peaks trigger.
Resolve the Terror of the Peaks trigger, dealing damage equal to Bladewing's power to any target.
Resolve the Bladewing trigger, returning Changeling Titan from your graveyard to the battlefield.
Repeat from step 2.

Infinite damage

Bladewing the Risen

Terror of the Peaks

Cast Changeling Titan by paying {4}{G}.
Changeling Titan enters the battlefield, championing Bloodline Necromancer.
Activate Viscera Seer by sacrificing Changeling Titan.
Changeling Titan dies, causing Bloodline Necromancer to return to the battlefield from exile.
Bloodline Necromancer enters the battlefield, returning Changeling Titan from your graveyard to the battlefield.
Repeat from step 2.
Resolve all Viscera Seer abilities, causing you to scry 1 an infinite number of times.

Combos with "Changeling Titan"