Yenna, Redtooth Regent, Peregrin Took, Krark-Clan Ironworks, and Phantatog

Prerequisites

• Yenna, Redtooth Regent on the battlefield
• Peregrin Took on the battlefield
• Krark-Clan Ironworks on the battlefield
• Phantatog on the battlefield
• Yenna does not have summoning sickness
• You control at least one Aura
• available

Steps

1. Activate Yenna by paying and tapping it, creating a token copy of an Aura you control and a Food artifact token, then untapping Yenna and causing you to scry 2
2. Activate Krark-Clan Ironworks by sacrificing the Food, adding
3. Activate Phantatog's first ability by sacrificing the Aura token, giving Phantatog +1/+1 until end of turn
4. Repeat

Results

• Infinitely large Phantatog until end of turn
• Infinite scry 2