Soulbond
Whenever Robin-Go-Right #3 and a creature paired with it with power 3 or less attack or block together, prevent all damage that would be dealt to that creature this turn.
With two fierce swords he laid low armies, but with a baby, he was defenseless.
See Challenge # 158.
jmg is right, soulbond as on Friendly Vulture was a fortuitous discovery for this set.
I reused it here, even reusing the "attack or block together" line.