Vega, Cruel Claw

Ninjutsu {1}{b}{b}
Whenever Vega, Cruel Claw attacks or enters the
battlefield, if it's attacking, you may pay X life.
When you do, add {x}. Spend this mana only to
pay equip costs of Equipments. Then, you may
pay the equip costs of any number of Equipments
you control to attach them to Vega, Cruel Claw.
Whenever Vega, Cruel Claw is dealt damage,
unattach an Equipment attached to it.