Requires

Ramos, Dragon Engine must be on the battlefield. Dragonsguard Elite must be on the battlefield. Blade of Shared Souls must be on the battlefield. Mirror Box must be on the battlefield. At least six +1/+1 counters on Dragonsguard Elite. Mana needed:

Steps

1. Activate Dragonsguard Elite by paying , doubling the number of +1/+1 counters on it.
2. Activate Blade of Shared Souls's equip ability by paying , attaching it to Dragonsguard Elite.
3. Blade of Shared Souls triggers, making Dragonsguard Elite become a copy of Ramos for as long as the equipment is attached to it.
4. Activate Dragonsguard Elite using Ramos's ability by removing five +1/+1 counters from it, adding .
5. Activate Blade of Shared Souls's equip ability by paying , attaching it to any creature besides Dragonsguard Elite and ending the copy effect.
6. Blade of Shared Souls triggers; decline to use its ability.
7. Repeat.
8. Once there are infinite +1/+1 counters on Dragonsguard Elite, you may repeat the loop from step 2 infinite times, adding infinite mana.

Results