Robber Geist

When Robber Geist enters the battlefield, Attach target equipment to it.
Robber Geist can only have one equipment attached to
it at a time. If a new equipment is attached to it,
remove the previous equipment.
When Robber Geist deals damage to an Equipped Creature, attach an equipment from that creature to Robber Geist.
If Robber Geist is ever Unequipped, Sacrifice it.
"Sorry, lad. Yer sword's gone." - General Zetta Inie,
to Private Oma Eao