Caliburn

Equipped Creature has Double Strike, If a Legendary Creature Caliburn was previously attached to enters, you may attach Caliburn to it. Whenever Caliburn or Equipped creature deals combat damage to a player, Choose one:

•Take control of up to 2 Token Artifacts that opponent controls.
• Create 2 Mana of any one colour.
• Transform Caliburn if you control 4 or more other Legendary Artifacts.
Reconfigure {3}