Malcolm, Keen-Eyed Navigator, Titan of Eternal Fire, Battered Golem, and Amoeboid Changeling

Prerequisites

• Malcolm, Keen-Eyed Navigator on the battlefield
• Titan of Eternal Fire on the battlefield
• Battered Golem on the battlefield
• Amoeboid Changeling on the battlefield
• Battered Golem and Amoeboid Changeling do not have summoning sickness
• available

Steps

1. Activate Amoeboid Changeling's first ability by tapping it, causing Battered Golem to gain all creature types until end of turn
2. Activate Battered Golem by paying and tapping it, dealing 1 damage to an opponent
3. Malcolm triggers, creating a Treasure artifact token
4. When the Treasure enters the battlefield, Battered Golem triggers, untapping itself
5. Activate the Treasure by tapping and sacrificing it, adding
6. Repeat from step 2

Results

• Infinite damage