Gallanfrax, the Dragonfell

When Gallanfrax, the Dragonfell enters the battlefield, target Dragon creature's controller sacrifices it. If that creature was legendary,
Gallanfrax gains indestructible. Then, put a
number of scale counters on Gallanfrax equal to
the sacrificed creature's mana value.
Equipped creature gets +X/+X where X is the
number of scale counters on Gallanfrax.
Equip Barbarian or Berserker {0}
Equip {3}