Ghired, Mirror of the Wilds, and Steelfin Whale

Prerequisites

• Ghired, Mirror of the Wilds on the battlefield
• Steelfin Whale on the battlefield
• You have a way to create an artifact token this turn
• Steelfin Whale does not have summoning sickness

Steps

1. Create an artifact token
2. When the artifact enters the battlefield, Steelfin Whale triggers, untapping itself
3. Activate Steelfin Whale by tapping it, creating a copy of the artifact token
4. Repeat from step 2

Results

• Infinite copies of artifact tokens you control that entered the battlefield this turn