Ramos, Dragon Engine + Dragonsguard Elite + Blade of Shared Souls + Mirror Box

Ramos, Dragon Engine

Dragonsguard Elite

Blade of Shared Souls

Mirror Box

How it works

1. Activate Dragonsguard Elite by paying 4, doubling the number of +1/+1 counters on it.
2. Activate Blade of Shared Souls's equip ability by paying 2, 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 2, 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.