Prospero, Poiteinian Marshal

Vigilance (Attacking doesn't cause it to tap.)
Whenever Prospero, Poiteinian Marshal
blocks a creature, put a +1/+1 counter on it.
When Prospero, Poiteinian Marshal dies,
target creature you control gets +1/+1 until
end of turn.
“Prospero, the Poiteinan”
—R. E. Howard, “Phoenix on the Sword”