Long Feng, Grand Secretariat + Invisible Woman, Sue Storm + Yahenni, Undying Partisan

Long Feng, Grand Secretariat

Invisible Woman, Sue Storm

Yahenni, Undying Partisan

How it works

1. Put a +1/+1 counter on the other Hero.
2. Invisible Woman triggers, creating a creature token.
3. Activate Yahenni by sacrificing the creature token.
4. When the creature token dies, Long Feng triggers, putting a +1/+1 counter on the other Hero.
5. Invisible Woman triggers, creating a creature token.
6. Resolve the Yahenni ability.
7. Repeat from step 3.