Kage, Gravebound Condottiere

Indestructible, formless (This does not die if it has 0 or less toughness. Damage still destroys it.)
Weaponize {3}{b}{b}
As long as Kage is an artifact, it isn't a creature and has "equipped creature gets +10/+0, has base toughness 0, gains hexproof and formless, and looses indestructible," and equip {1}{b}{b}.
Whenever a creature attached to Kage dies, you may remove a weapon counter from Kage.
{4}{b}{b}: Put a weapon counter on Kage.