Requires

Enduring Scalelord must be in hand. Lithoform Engine must be on the battlefield. You have a way to put a +1/+1 counter on Enduring Scalelord. Mana needed:

Steps

1. Cast Enduring Scalelord by paying .
2. Holding priority, activate Lithoform Engine's third ability by paying and tapping it, copying the Enduring Scalelord spell.
3. Resolve both Enduring Scalelord spells.
4. Put a +1/+1 counter on either Enduring Scalelord.
5. The Enduring Scalelord who didn't have the counter put on it triggers, putting a +1/+1 counter on itself.
6. Repeat step 5.

Results