Caduceus, Staff of Hermes{2}{W}
Legendary Artifact — Equipment
Equipped creature has lifelink.
As long as you have 30 or more life, equipped creature gets +5/+5 and has indestructible and "Prevent all damage that would be dealt to this creature."
Equip {W}{W}
It can be a key, a weapon, and a way to attain great power.
Artist: Evan Shipard