Rescue Retriever

Flash
When this creature enters, put a +1/+1 counter on each other Soldier you control.
Prevent all damage that would be dealt to other attacking Soldiers you control.

Magic Online Promos

It brings the two things weary soldiers need most: medicine and morale.

The Brothers' War

If Rescue Retriever leaves the battlefield before combat damage is dealt to your other attacking Soldiers, they will take damage as normal. Notably, this means it is usually a bad idea to attack with Rescue Retriever if your opponent could block it with a creature that has first strike and enough power to kill it.

Rescue Retriever prevents damage to other attacking Soldiers even if it isn't also attacking.