Enduring Scalelord, and Helm of the Host

Prerequisites

• Enduring Scalelord on the battlefield
• Helm of the Host on the battlefield
• You have a way to put a +1/+1 counter on Enduring Scalelord
• Helm of the Host attached to Enduring Scalelord

Steps

1. At the beginning of your combat phase, Helm of the Host triggers, creating a token copy of Enduring Scalelord with haste
2. Put a +1/+1 counter on either Enduring Scalelord
3. The Enduring Scalelord who didn't have the counter put on it triggers, putting a +1/+1 counter on itself
4. Repeat step 3

Results

• Infinite +1/+1 counters on a creature token with haste
• Infinite +1/+1 counters on Enduring Scalelord